CBSE Class 7

Reproduction in Plants Class 7 Extra Questions and Answers Science Chapter 12 PDF are solved by experts and will guide students in the right direction. Students can get how to tackle different questions easily by solving the Extra Questions for Class 7 Science Question bank on a regular basis.

Class 7 Science Chapter 12 Extra Questions and Answers Reproduction in Plants

Extra Questions for Class 7 Science Chapter 12 Reproduction in Plants with Answers

Reproduction in Plants Class 7 Extra Questions Very Short Answer Type

Question 1.
What is reproduction?
Answer:
The production of new individuals from their parents is known as reproduction.

Question 2.
What is cutting?
Answer:
Cutting is to cut piece of a branch of a plant with a pode which is capable of*producing new plant under suitable conditions.

Question 3.
Name one plant that can reproduce through leaves.
Answer:
Bryophyllum.

Question 4.
What are the male and female reproductive part in plants?
Answer:
The stamens are the male reproductive part and the pistil is the female reproductive part in plants.

Question 5.
What are unisexual flowers?
Answer:
The flowers which contain either only the pistil or the stamens are called unisexual flowers.

Question 6.
What are bisexual flowers?
Answer:
The flowers which contain both stamens and pistil are called bisexual flowers.

Question 7.
What is fruit?
Answer:
Mature ovary is called fruit.

Reproduction in Plants Class 7 Extra Questions Short Answer Type 1

Question 1.
What are the vegetative parts of plant?
Answer:
Roots, stems and leaves are called the vegetative parts of a plant.

Question 2.
Write the benefits of vegetative propagation.
Answer:
Benefits of vegetative propagation:

1. Plants produced by vegetative propagation take less time to grow and bear flowers and fruits earlier than those produced from seeds.
2. The new plants are exact copies of the parent plant, as they are produced from a single parent.

Reproduction in Plants Class 7 Extra Questions Short Answer Type 2

Question 1.
Where are male and female gametes in flowers?
Answer:
Anther contains pollen grains which produce male gametes. The female gamete or the egg is formed in an ovule, which is a part of ovary.

Question 2.
Draw figure to show self and cross-pollination.
Answer:

Question 3.
Draw a diagram to show vegetative reproduction in bryophyllum.
Answer:

Question 4.
How are plants get benefitted by seed dispersal?
Answer:
Benefits of seed dispersal to plants :

1. It prevents competition between the plant and its own seedlings for sunlight, water and minerals.
2. It also enables the plants to invade new habitats for wider distribution.

Question 5.
We have never seen the seeds of sugarcane, potato and rose. How do these plants reproduce?
Answer:
Sugarcane, potato and rose reproduce by means of vegetative propagation:

Question 6.
Show fertilization with the help of diagrams.
Answer:

Reproduction in Plants Class 7 Extra Questions Long Answer Type

Question 1.
Describe reproduction in fungus.
Answer:
The fungi on a suitable place grow from spores which are present in the air. When spores are released they keep floating in the air. As they are very light they can cover long distances.

The spores are asexual reproductive bodies. Each spore is covered by a hard protective coat to withstand unfavourable conditions such as high temperature and buy humidity. So they can survive for a long tirhe. Under favourable conditions, a spore germinates and develops into a new individual.

Question 2.
Explain the method of reproduction in yeast with the help of a diagram.
Answer:
Yeast is a single-celled organism which reproduces by budding. When it gets sufficient nutrients, a small bulb-like projection starts coming out from it which is called a bud. The bud gradually grows and gets detached from the parent cell and forms a new yeast cell. The new yeast cell grows, matures and produces more yeast cells. Sometimes, another bud arises from the bud forming a chain of buds. If this process continues, a large number of yeast cells are produced in a short time.

Question 3.
Explain the process of reproduction in alga.
Answer:
Algae are the slimy green patches that are often seen in ponds, or in other stagnant water bodies. When water and nutrients are available algae grow and multiply rapidly by fragmentation. An alga breaks up into two or more fragments. These fragments or pieces grow into new individuals. This process continues and they cover a large area in a short period of time.

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Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11 PDF are solved by experts and will guide students in the right direction. Students can get how to tackle different questions easily by solving the Extra Questions for Class 7 Science Question bank on a regular basis.

Class 7 Science Chapter 11 Extra Questions and Answers Transportation in Animals and Plants

Extra Questions for Class 7 Science Chapter 11 Transportation in Animals and Plants with Answers

Transportation in Animals and Plants Class 7 Extra Questions Very Short Answer Type

Question 1.
Name the transport medium in human beings.
Answer:
Blood.

Question 2.
What is pulse rate?
Answer:
The number of beats per minute is called the pulse rate.

Question 3.
What is the pulse rate of a resting person?
Answer:
A resting person, usually has a pulse rate between 72 and 80 beats per minute.

Question 4.
Where is heart located?
Answer:
The heart is located in the chest cavity with its lower tip slightly tilted towards the left.

Question 5.
What are the two upper chamber of hearts called?
Answer:
Atria.

Question 6.
What are ventricles?
Answer:
The two lower chambers of heart are called ventricles.

Transportation in Animals and Plants Class 7 Extra Questions Short Answer Type 1

Question 1.
What are the functions of arteries and veins?
Answer:
Arteries and veins are two types of blood vessels. Arteries carry oxygen-rich blood from the heart to all parts of thd body. On the other hand, veins carry carbon dioxide-rich blood from all parts of the body back to the heart.

Question 2.
Why do arteries have thick elastic walls ?
Answer:
Since the blood flow is rapid and at a high pressure, the arteries have thick elastic wralls.

Question 3.
Pulmonary artery carries carbon dioxide-rich blood, yet is not called a vein. Why ?
Answer:
Pulmonary artery carries blood from the heart to the lungs, so it is called an artery and not a vein.

Question 4.
Write two functions of sweat.
Answer:
(i) Removal of waste products (excess salts).
(ii) Cooling of body.

Transportation in Animals and Plants Class 7 Extra Questions Short Answer Type 2

Question 1.
Write about circulation in sponges and hydra.
Answer:
Animals such as sponges and Hydra do not possess any circulatory system. The water in which they live brings food and oxygen as it enters their bodies. The water carries away waste materials and carbon dioxide as it moves out. Thus, these animals do not need a circulatory fluid like the blood.

Question 2.
What is the role of haemoglobin?
Answer:
Haemoglobin binds with oxygen and transports it to all the parts of the body and ultimately to the cells. It will be difficult to provide oxygen efficiently to all the cells of the body without haemoglobin. So, it is vital for life.

Question 3.
Draw a schematic diagram of blood circulation.
Answer:

Question 4.
Write about excretion in aquatic and land animals.
Answer:
The way in which waste chemicals are removed from the body of the animal depends on the availability of water. Aquatic animals like fishes, excrete cell waste in gaseous form (ammonia) which directly dissolves in water. Some land animals like birds, lizards, snakes excrete a semi-solid, white coloured compound (uric acid). The major excretory product in humans is urea.

Transportation in Animals and Plants Class 7 Extra Questions Long Answer Type

Question 1.
Describe the excretion in humans.
Answer:
Kidney is the most important organ of excretion in humans. The mechanism to filter the blood is done by the blood capillaries in the kidneys. When the blood reaches the two kidneys, it contains both useful and harmful substances. The useful substances are absorbed back into the blood. The wastes dissolved in water are removed as urine.

From the kidneys, the urine goes into the urinary bladder through tube-like ureters. It is stored in the bladder and is passed out through the urinary opening at the end of a muscular tube called urethra. The kidneys, ureters, bladder and urethra form the excretory system.

Question 2.
How is water absorbed in plants?
Answer:
Plants absorb water and minerals by the roots. The root have root hairs. The root hairs increase the surface area of the root for the absorption of water and mineral nutrients dissolved in water. The root hairs are in contact with the water present between the soil particles.

Question 3.
How is water transported in plants?
Answer:
Plants have pipe-like vessels to transport water and nutrients from the soil. The vessels are made of special cells, forming the vascular tissue. The vascular tissue for the transport of water and nutrients in the plant is called the xylem.

The xylem forms a continuous network of channels that connects roots to the leaves through the stem and branches and thus transports water to the entire plant. The process of osmosis and transpiration too helps in movement of water in plants.

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Respiration in Organisms Class 7 Extra Questions and Answers Science Chapter 10 PDF are solved by experts and will guide students in the right direction. Students can get how to tackle different questions easily by solving the Extra Questions for Class 7 Science Question bank on a regular basis.

Class 7 Science Chapter 10 Extra Questions and Answers Respiration in Organisms

Extra Questions for Class 7 Science Chapter 10 Respiration in Organisms with Answers

Respiration in Organisms Class 7 Extra Questions Very Short Answer Type

Question 1.
Where does cellular respiration take place?
Answer:
It takes place in the cells of organisms.

Question 2.
Write the equation for breakdown of food in aerobic respiration.
Answer:

Question 3.
Write the equation for breakdown of food in anaerobic respiration.
Answer:

Question 4.
What is a breath?
Answer:
A breath means one inhalation plus one exhalation.

Question 5.
What is the breathing rate of an average person at rest?
Answer:
On an average, an adult human being at rest breathes in and out 15-18 times in a minute.

Question 6.
How do ribs and diaphragm move during inhalation?
Answer:
During inhalation, ribs move up and outwards and diaphragm moves downwards.

Question 7.
What care should be taken during sneezing?
Answer:
When one sneezes, he/she should cover his/her nose so that the foreign particles expelled out are not inhaled by other persons.

Question 8.
Which is the respiratory organ for earthworm?
Answer:
Skin.

Question 9.
What is exhalation?
Answer:
Giving out of air rich in carbon dioxide is called exhalation.

Respiration in Organisms Class 7 Extra Questions Short Answer Type 1

Question 1.
What are anaerobes? Give example.
Answer:
There are some organisms such as yeast that can survive in the absence of air. They are called anaerobes.

Question 2.
What is yeast? What is their use?
Answer:
Yeasts are single-celled organisms. They respire anaerobically and during this process yield alcohol. They are, therefore, used to make wine and beer.

Question 3.
Why do you get muscle cramps after heavy exercise?
Answer:
The cramps occur when muscle cells respire anaerobically. The partial breakdown of glucose produces lactic acid. The accumulation of lactic acid causes muscle cramps.

Question 4.
Show the composition of inhaled and exhaled air.
Answer:
The percentage of oxygen and carbon dioxide inhaled and exhaled air:

Respiration in Organisms Class 7 Extra Questions Short Answer Type 2

Question 1.
How does anaerobic respiration occur in humans?
Answer:
During heavy exercise, fast running, cycling, walking for many hours or heavy weight lifting, the demand for energy is high. But the supply of oxygen to produce energy is limited. Then anaerobic respiration takes place in the muscle cells to fulfil the demand of energy:

Question 2.
Describe respiration in earthworm.
Answer:
Earthworms breathe through their skins. The skin of an earthworm feels moist and slimy on touching. Gases can easily pass through them.

Respiration in Organisms Class 7 Extra Questions Long Answer Type

Question 1.
Give a brief description of our respiratory system with diagram.
Answer:
Normally we take in air through our nostrils. When we inhale air, it passes through our nostrils into the nasal cavity. From the nasal cavity, the air reaches our lungs through the windpipe. Lungs are present in the chest cavity.

This cavity is surrounded by ribs on the sides. A large muscular sheet called diaphragm forms the floor of the chest cavity.

Question 2.
Draw diagrams to show movements of rib and diaphragm during breathing.
Answer:

Question 3.
Describe respiration in cockroach.
Answer:
A cockroach has small openings on the sides of its body. These openings are called spiracles. Internally, they have a network of air tubes called tracheae for gas exchange rich air rushes through spiracles into the tracheal tubes, diffuses into the body tissue, and reaches every cell of the body. Similarly, carbon dioxide from the cells goes into the tracheal tubes and moves out through spiracles.

Question 4.
How does breathing take place?
Answer:
Breathing involves the movement of the diaphragm and the rib cage. During inhalation, ribs move up and outwards and diaphragm moves down. This movement increases space in our chest cavity and air rushes into the lungs. The lungs get filled with air. During exhalation, ribs move down and inwards, while diaphragm moves up to its former position. This reduces the size of the chest cavity and air is pushed out of the lungs.

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Soil Class 7 Extra Questions and Answers Science Chapter 9 PDF are solved by experts and will guide students in the right direction. Students can get how to tackle different questions easily by solving the Extra Questions for Class 7 Science Question bank on a regular basis.

Class 7 Science Chapter 9 Extra Questions and Answers Soil

Extra Questions for Class 7 Science Chapter 9 Soil with Answers

Soil Class 7 Extra Questions Very Short Answer Type

Question 1.
What is soil?
Answer:
The uppermost layer of land area of earth, which is a mixture of rock particles and humus is called soil.

Question 2.
What is soil profile?
Answer:
A vertical section through different layers of the soil is called the soil profile.

Question 3.
Write the formula for percolation rate.
Answer:
Percolation rate (mL/min)
= \(\frac{\text {amount of water(mL)}}{\text {percolation time(min)}}\)

Question 4.
Name the climatic factors affecting soil properties.
Answer:
Soil is affected by wind, rainfall, temperature, light and humidity.

Question 5.
What is the ideal soil for paddy?
Answer:
For paddy, soils rich in clay and organic matter, having a good capacity to retain water, are ideal.

Question 6.
Which soil is suited for lentils?
Answer:
For lentils (masoor) and other pulses, loamy soils, which drain water easily, are required.

Question 7.
Which soil is suitable for cotton?
Answer:
For cotton, sandy-loam or loam, which drain water easily and can hold plenty of air, are more suitable.

Question 8.
What is soil erosion?
Answer:
The removal of fertile topsoil by water, wind or ice is known as soil erosion.

Soil Class 7 Extra Questions Short Answer Type 1

Question 1.
Why is there a demand to ban polythene bags?
Answer:
Polythene bags and plastics pollute the soil. They also kill the organisms living in the soil. That is why, there is a demand to ban polythene bags and plastics.

Question 2.
Name the layers of soil formed when soil is dissolved in water and left undisturbed.
Answer:
Humus, water, clay, sand and gravel.

Question 3.
What is soil horizon?
Answer:
Each layer of soil differs in feel (texture), colour, depth and chemical composition. These layers are referred to as horizons.

Question 4.
What is B-horizon?
Answer:
The second layer of soil has a lesser amount of humus but more of minerals. This layer is generally harder and more compact and is called the B-horizon or the middle layer.

Question 5.
Write about C-horizon.
Answer:
The third layers of soil is the C-horizon, which is made up of small lumps of rocks with cracks and crevices. Below this layer is the bedrock, which is hard and difficult to dig with a spade.

Soil Class 7 Extra Questions Short Answer Type 2

Question 1.
Draw the different horizons of soil.
Answer:

Question 2.
Write briefly about the topsoil.
Answer:
The uppermost horizon is generally dark in colour as it is rich in humus and minerals. The humus makes the soil fertile and provides nutrients to growing plants. This layer is generally soft, porous and can retain more water. It is called the topsoil or the A-horizon.

This provides shelter for many living organisms such as worms, rodents, moles and beetles. The roots of small plants are embedded entirely in the topsoil.

Question 3.
Write briefly about loamy soil.
Answer:
The best topsoil for growing plants is loam. Loamy soil is a mixture of sand, clay and another type of soil particle known as silt. Silt occurs as a deposit in river beds. The loamy soil also has humus in it. It has the right water holding capacity for the growth of plants.

Question 4.
Write about soil erosion.
Answer:
The removal of fertile topsoil by water, wind, or ice is known as erosion. Plant roots firmly bind the soil. In the absence of plants, soil becomes loose. So it can be moved by wind and flowing water. So, cutting of trees and deforestation should be prevented and efforts should be made to increase the green areas.

Soil Class 7 Extra Questions Long Answer Type

Question 1.
Discuss the dependence of crop on soil type.
Answer:
The climatic factors, as well as the components of soil, determine the various types of vegetation and crops that might grow in any region.

Clayey and loamy soils are both suitable for growing cereals like wheat and gram. Such soils are good at retaining water. For paddy, soils rich in clay and organic matter and having a good capacity to retain water, are ideal. For lentils (masoor) and other pulses, loamy soils, which drain water easily, are required.

For cotton, sandy-loam or loam, which drain water easily and can hold plenty of air, are more suitable. Crops such as wheat are grown in the fine clayey soils, because they are rich in humus and are very fertile.

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Winds, Storms and Cyclones Class 7 Extra Questions and Answers Science Chapter 8 PDF are solved by experts and will guide students in the right direction. Students can get how to tackle different questions easily by solving the Extra Questions for Class 7 Science Question bank on a regular basis.

Class 7 Science Chapter 8 Extra Questions and Answers Winds, Storms and Cyclones

Extra Questions for Class 7 Science Chapter 8 Winds, Storms and Cyclones with Answers

Winds, Storms and Cyclones Class 7 Extra Questions Very Short Answer Type

Question 1.
What is wind?
Answer:
Moving air is called wind.

Question 2.
What is the direction of flow of air?
Answer:
Air moves from the region where the air pressure is high to the region where the pressure is low.

Question 3.
Which air is lighter, hot or cool?
Answer:
Hot air is lighter.

Question 4.
Which region gets maximum sunlight?
Answer:
Regions close to the equator get maximum sunlight.

Question 5.
What does monsoon wind carry?
Answer:
Water (moisture).

Question 6.
Where do thunderstorms develop mostly?
Answer:
Thunderstorms develop in hot, humid tropical areas like India very frequently.

Question 7.
What do you mean by the eye of a storm?
Answer:
The centre of a cyclone is a calm area. It is called the eye of the storm.

Question 8.
Which factors contribute to the development of cyclone?
Answer:
Factors like wind speed, wind direction, temperature and humidity contribute to the development of cyclones.

Question 9.
When is cyclone alert issued?
Answer:
A cyclone alert or cyclone watch is issued 48 hours in advance of any expected storm.

Question 10.
When is cyclone warning issued?
Answer:
A cyclone warning is issued 24 hours in advance.

Winds, Storms and Cyclones Class 7 Extra Questions Short Answer Type 1

Question 1.
How are clouds helpful?
Answer:
Clouds bring rain which is vital for survival of living beings. Farmers in our country depend mainly on rain for irrigation.

Question 2.
How does the eye of a cyclone harm us?
Answer:
The low pressure in the eye lifts water surface in the centre. The rising water may be as high as 3-12 metres. It appears like a water wall moving towards the shore. As a result, the seawater enters the low-lying coastal areas, causing severe loss of life and property. It also reduces the fertility of the soil.

Question 3.
How do high-speed winds accompanying a cyclone harm us?
Answer:
High-speed winds accompanying a cyclone can damage houses, telephones and other communication systems, trees, etc., causing tremendous loss of life and property.

Question 4.
Explain the structure of a tornado?
Answer:
Atorando is a dark funnel-shaped cloud that reaches ground from the sky. The diameter of a tornado can be as small as a meter and as large as a kilometre, or even wider. The funnel of a tornado sucks dust, debris and everything near it at the base (due to low pressure) and throws them out near the. top.

Winds, Storms and Cyclones Class 7 Extra Questions Short Answer Type 2

Question 1.
Suggest three effective safety measures for cyclone.
Answer:

1. A cyclone forecast and warning service.
2. Rapid communication of warnings to the Government agencies, the ports, fishermen, ships and to the general public.
3. Construction of cyclone shelters in the cyclone-prone areas, and administrative arrangements for moving people fast to safer places.

Question 2.
Suggest some precautions in a cyclone hit area.
Answer:

1. Do not drink water that could be contaminated. Always store drinking water for emergencies.
2. Do not touch wet switches and fallen power lines.
3. Do not go out just for the sake of fun.
4. Do not pressurise the rescue force by making undue demands.
5. Cooperate and help your neighbours and friends.

Winds, Storms and Cyclones Class 7 Extra Questions Long Answer Type

Question 1.
Describe the structure of a cyclone.
Answer:
The centre of a cyclone is a calm area. It is called the eye of the storm. A large cyclone is a violently rotating mass of air in the atmosphere, 10 to 15 km high. The diameter of the eye varies from 10 to 30 km. It is a region free of clouds and has light winds.

Around this calm and clear eye, there is a cloud region of about 150 km in size. In this region there are high-speed winds (150-250 km/h) and thick clouds with heavy rain. Away from this region the wind speed gradually decreases.

Question 2.
How does a thunderstorm become a cyclone?
Answer:
Before cloud formation, water takes up heat from the atmosphere to change into vapour. When water vapour changes back to liquid form as raindrops, this heat is released to the atmosphere. The heat released to the atmosphere warms the air around.

The air tends to rise and causes a drop in pressure. More air rushes to the centre of the storm. This cycle is repeated. The chain of events ends with the formation of a very low-pressure system with very high-speed winds revolving around it. It is this weather condition that we call a cyclone.

Question 3.
Suggest precautions if storm is accompanied by lightning.
Answer:
If a storm is accompanied by lightning, we must take the following precautions:

1. We should not take shelter under an isolated tree. If in a forest, take shelter under a small tree.
2. We must not take shelter under an umbrella with a metallic end.
3. We should not sit near a window. Open garages, storage sheds, metal sheds are not safe places to take shelter.
4. A car or a bus with closed windows is a safe place to take shelter.
5. If in water, we should get out and go inside a building.
6. We should not lie on the ground.

Question 4.
Draw a diagram to show the formation of cyclone.
Answer:

Question 5.
Show the phenomena that lead to the formation of clouds, falling of rain and creation of storms and cyclones with the help of a chart.
Answer:

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Weather, Climate and Adaptations of Animals to Climate Class 7 Extra Questions and Answers Science Chapter 7 PDF are solved by experts and will guide students in the right direction. Students can get how to tackle different questions easily by solving the Extra Questions for Class 7 Science Question bank on a regular basis.

Class 7 Science Chapter 7 Extra Questions and Answers Weather, Climate and Adaptations of Animals to Climate

Extra Questions for Class 7 Science Chapter 7 Weather, Climate and Adaptations of Animals to Climate with Answers

Weather, Climate and Adaptations of Animals to Climate Class 7 Extra Questions Very Short Answer Type

Question 1.
Who prepares the weather report?
Answer:
The weather reports are prepared by the Meteorological Department of the Govt.”

Question 2.
What causes the changes in weather?
Answer:
Sun.

Question 3.
When is the climate of a place called hot?
Answer:
If we find that the temperature at a place is high most of the time, then we Say that the climate of that place is hot.

Question 4.
When is the climate of a place called hot and wet?
Answer:
If there is also heavy rainfall alongwith heat on most of the days at the same place, then we can say that the climate of that place is hot and wet.

Question 5.
Name the location where climate is hot and dry.
Answer:
Rajasthan.

Question 6.
Name two countries where there is tropical rain forest.
Answer:
India, Brazil.

Question 7.
Name one polar animal.
Answer:
Penguin.

Question 8.
Which type of paws does a polar bear have?
Answer:
Wide and large.

Question 9.
What makes penguins good swimmers?
Answer:
Their bodies are streamlined and their feet have Webs, making them good swimmers.

Question 10.
Name one bird from Siberia that comes to-India.
Answer:
Siberian Crane.

Weather, Climate and Adaptations of Animals to Climate Class 7 Extra Questions Short Answer Type 1

Question 1.
Name the various information given on the weather report in newspaper.
Answer:
Maximum and minimum temperatures; time for sunrise, sunset, moonrise and moonset; maximum and minimum humidity, forecast, etc.

Question 2.
How is rainfall measured?
Answer:
Rainfall is measured by an instrument -called the rain gauge. It is basically a metallic measuring cylinder with a funnel on top to collect rainwater.

Question 3.
What is the climate in Rajasthan?
Answer:
In Rajasthan, the temperature is high during most part of the year. But during winter, which lasts only for a few months, the temperature is quite low. This region receives very little rainfall. This is the typical desert climate. It is hot and dry.

Question 4.
Name four countries in polar region.
Answer:
Canada, Greenland, Iceland, Norway.

Question 5.
What do birds in polar region do to survive in winter?
Answer:
The birds migrate to warmer regions when winter sets in. They come back after the winter is over.

Question 6.
Name the major types of animals found in rainforests.
Answer:
The major types of animals living in thejrainforests are monkeys, apes, gorillas, lions, tigers,elephants, leopards, lizards, snakes, birds uid insects.

Weather, Climate and Adaptations of Animals to Climate Class 7 Extra Questions Short Answer Type 2

Question 1.
How is average temperature of a month calculated?
Answer:
The mean temperature for a given month is found in two steps. First we find the average of the temperatures recorded during the month. Second, we calculate the average of such average temperatures over many years. That gives the mean temperature.

Question 2.
How do penguins adapt with polar climate?
Answer:
Adaptation of penguins to survive in polar region:

1. Penguins are white and merge well with the white background.
2. They also have a thick skin and a lot of fat to protect it from cold.
3. Penguins huddle together. This they do to keep warm.
4. Further, their bodies are streamlined and their feet have webs, making them good swimmers.

Weather, Climate and Adaptations of Animals to Climate Class 7 Extra Questions Long Answer Type

Question 1.
Write the adaptations in a polar bear that helps it to survive in extreme cold climate of polar regions.
Answer:

1. It has two thick layers of fur. These keep it warm in cold weather.
2. The fat insulates its body from cold and keeps it warm. It has a layer of fat under its skin.
3. It has long curved and sharp claws. These helps it to walk on ice.
4. Its predator and prey are unable to see it. The white fur not easily visible in the snowy white background.
5. It has a very strong sense of smell. It helps the bear to locate and catch its prey.

Question 2.
Write the features of lion-tailed macaque.
Answer:
Features of lion-tailed macaque:

1. Its most outstanding feature is the silver-white mane, which surrounds the head from the cheeks down to its chin.
2. It is a good climber and spends a major part of its life on the tree.
3. It feeds mainly on fruits. It also eats seeds, young leaves, stems, flowers and buds.
4. Since it is able to get sufficient food on the trees, it rarely comes down on the ground.
5. The lion-tailed macaque (also called Beard ape) lives in the rainforests of Western Ghats.

Question 3.
Why do rainforests support a wide variety of plants and animals? Discuss some of the adaptations of animals to the climate of these regions.
Answer:
The tropical rainforests support a wide variety of plants and animals due to continuous warmth and rain. Since the numbers are large, there is intense competition for food and shelter.
This made animals to develop new features which would allow them to survive in such an environment.
For example:

1. Many animals are adapted to living on the trees. Red-eye frog has developed sticky pads and monkeys have long tails.
2. As there is competition for food, some animals are adapted to get food not easily reachable, e.g., the bird Toucan possesses a long, large beak to reach distant fruits on fragile branches.
3. Many tropical animals have sensitive hearing sharp eyesight, thick skin and a skin colour which helps them to camouflage by blending with the surroundings. This is to protect them from predators.

Hope the knowledge provided regarding the Weather, Climate and Adaptations of Animals to Climate Class 7 Extra Questions and Answers has helped you to the possible extent. For more info feel free to reach us and we will guide you at the earliest possibility. Stay connected to our site to avail latest updates on Extra Questions for Various Classes instantly.