Very Short Answer Questions<\/span><\/p>\nQuestion 1.
\nWho is called as the father of taxonomy?
\nAnswer:
\nCarious Linneaus<\/p>\n
Question 2.
\nWhich division of plants is also considered as amphibian of plant kingdom?
\nAnswer:
\nBryophytes having motile sperms are considered as amphibian of plant kingdom.<\/p>\n
Question 3.
\nWhich is the first division of plants to bear true shoot and root?
\nAnswer:
\nPteridophytes are the first to bear true root and shoot.<\/p>\n
<\/p>\n
Question 4.
\nWhat are sporophylls in ferns?
\nAnswer:
\nThe leaves bearing the sporangia on their lower surface are called the sporophylls.<\/p>\n
Question 5.
\nWhat are circinate leaves in a dryopteris?
\nAnswer:
\nCircinate leaves are young leaves with the top margins folded inwardly.<\/p>\n
Question 6.
\nWhich part of pinus plant bears naked seeds?
\nAnswer:
\nThe female cone in pinus plant bears the seeds.<\/p>\n
Question 7.
\nWhich is the lateral appendage of shoot in angiosperms that acts as the reproductive organ?
\nAnswer:
\nFlower is the lateral appendage of shoot that acts as the reproductive organ.<\/p>\n
Question 8.
\nWhich phase is dominant in a Funaria plant, gametophytic i sporophytic?
\nAnswer:
\nIn funaria, the gametophytic phase is dominant over the sporophytic phase.<\/p>\n
Question 9.
\nWhich type of spores are produced by the Funaria sporophyte?
\nAnswer:
\nThe sporophyte always produces the haploid spores that give rise gametophytic thallus.<\/p>\n
Question 10.
\nIn phanerogams, which plants bear the tap root system, gymnosperms or angiosperms?
\nAnswer:
\nIn phanerogams, the gymnosperms bear the tap roots.<\/p>\n
Question 11.
\nIn which plants the algae and fungi are present in the symbiotic relationship?
\nAnswer:
\nLichens consist of algae and fungi in the symbiotic relationship.<\/p>\n
Question 12.
\nWhich type of plants do you expect to observe in the artic regions?
\nAnswer:
\nBryophytes<\/p>\n
<\/p>\n
Question 13.
\nWhich division of plants consists mostly of ornamental plants?
\nAnswer:
\nPteridophytes, mostly ferns.<\/p>\n
Question 14.
\nName an aquatic pteridophyte that is capable of nitrogen fixation?
\nAnswer:
\nAzolla<\/p>\n
Question 15.
\nName any two products of economical value that are obtained from algae.
\nAnswer:
\nIodine from kelps and silica from diatoms.<\/p>\n
Question 16.
\nWhich term is used to describe the network of hyphae in Rhizopus?
\nAnswer:
\nMycelium<\/p>\n
Question 17.
\nWhich nutrient medium is mostly used in laboratory for culturing microorganisms?
\nAnswer:
\nAgar-agar, a product obtained from an algae is widely used as the culture medium.<\/p>\n
Question 18.
\nWhat are the male and female reproductive organs in a moss or fern?
\nAnswer:
\nIn a moss or fern, the male and female reproductive organs are multicellular. They are called antheridum and archegonium respectively.<\/p>\n
Question 19.
\nName the division of plants whose members show a clearly distinct phases of alternation of generation.
\nAnswer:
\nThe members of bryophytes shows a clearly distinct alternation of generation with gametophytic phase being dominant over the sporophytic phase.<\/p>\n
<\/p>\n
Question 20.
\nHow is a protozoan different from a metazoan?
\nAnswer:
\nA protozoan is unicellular but a metazoan is multicellular.<\/p>\n
Question 21.
\nWhat is reproductive nature of an earthworm, unisexual or bisexual?
\nAnswer:
\nAn earthworm is bisexual, although the ovaries and testes mature at the different rimes.<\/p>\n
Question 22.
\nWhich cockroach has the larger antennae, male or female?
\nAnswer:
\nThe male cockroach has larger antennae than the female cockroach to perceive the odour in the surroundings.<\/p>\n
Question 23.
\nWhich phylum in animal kingdom has the largest and the second largest number of animals?
\nAnswer:
\nThe phylum arthropods has the largest and phylum mollusca has the second largest number of animals.<\/p>\n
Question 24.
\nWhich animal phylum is characterized by the presence of water canal system and water vascular system?
\nAnswer:
\nAnimals belonging to phylum Echinodermata have water vascular system, while the animals belonging to phylum Porifera have water canal system.<\/p>\n
Question 25.
\nWhich is the common physical feature in a bird and a fish?
\nAnswer:
\nA bird and a fish both have streamlined body.<\/p>\n
Question 26.
\nName the animal that resembles both the reptiles and mammals.
\nAnswer:
\nDuck billed platypus as it lays eggs like reptiles.<\/p>\n
Question 27.
\nName an aerial and an aquatic mammal.
\nAnswer:
\nThe only aerial mammal is bat and whale is an aquatic mammal.<\/p>\n
<\/p>\n
Question 28.
\nGive an example of a parasitic annelida?
\nAnswer:
\nLeech ( Hinidinaria) is the parasitic annelida. It is parasitic on cattle fronl whom it sucks the blood.<\/p>\n
Question 29.
\nName any three animals that show the generation of their body parts.
\nAnswer:
\nStar fish regenerates it lost arm, frog regenerates its limb and a hous lizard regenerates it lost tail.<\/p>\n
Question 30.
\nThe animals of which phylum are characterized by the presence of protective hard shell?
\nAnswer:
\nIn the phylum Mollusca, all animals posses protective hard shell.<\/p>\n
Question 31.
\nSea horse is a vertebrate. In which class has it been placed li classification?
\nAnswer:
\nSea horse has been placed in the classes of Pisces under Oestiochythe<\/p>\n
Question 32.
\nName the three layers present in the embryo of a triploblastic animal.
\nAnswer:
\nThe three layers are ectoderm, mesoderm and endoderm.<\/p>\n
Short Answer Questions<\/span><\/p>\nQuestion 1.
\nWho proposed binomial nomenclature? State its significance.
\nAnswer:
\nThe concept of binomial nomenclature was proposed by Carolus Linnaeus It was meant to give the scientific name to an organism for<\/p>\n
\n- easy identification of an organism because the first name refers to the gen while the second name is the specific epithet.<\/li>\n
- maintaining the uniformity of the names worldwide.<\/li>\n<\/ul>\n
Question 2.
\nDraw a labelled diagram of a typical bacterium.
\nAnswer:
\n<\/p>\n
Question 3.
\nHow are prokaryotes different from eukaryotes?
\nAnswer:
\nThe organisms with the prokaryotic cell are characterized by the abs of well defined nucleus and membrane bound cell organelles while those with t eukaryotic cell, plant or animal cell are called eukaryotes.<\/p>\n
In five kingdom system, prokaryotes have been placed in kingdom Me while the eukaryotic organisms have been placed in the rest of the four kingdoms.<\/p>\n
<\/p>\n
Question 4.
\nWhy are viruses considered to be at the border line of living and non-livings?
\nAnswer:
\nViruses are the obligate parasites, they are living only when in body of a living host otherwise, they act as non-living. They can be filtered and crystallized like chemicals.<\/p>\n
Question 5.
\nWhat are protozoa? Give examples.
\nAnswer:
\nProtozoa are the eukaryotic unicellular animals which belongs to the kingdom ‘Protista’. These animals are either free living or parasitic. The free living protozoa include amoeba and paramecium while the parasitic protozoa which are the cause of infectious disease to mankind include<\/p>\n
\n- Plasmodium, the causative agent of malaria.<\/li>\n
- Trypanosoma, the causative agent of sleeping sickness.<\/li>\n
- Entameoba histolytica, the causative agent of amoebiasis.<\/li>\n<\/ul>\n
Question 6.
\nWhy are the saprophytes called the natural cleaners of the environment?
\nAnswer:
\nThe saprophytes are called the natural cleaners of the environment because they decompose the dead organic matter of living organisms such as the agricultural wastes and animal excreta into simple inorganic form to allow the recycling of the different nutrients.<\/p>\n
Question 7.
\nName the unicellular fungi with its importance.
\nAnswer:
\nOne of the unicellular fungi is yeast. It is commercially an important gradient as it lays the foundation of brewery and bakery industry because of its ability of anaerobically breaking down of sugar, producing the alcohol, ethanol and carbon dioxide. The ethanol is the product used in brewery industries and produced carbon dioxide is used in bakery industry to make the bread or cake soft and spongy.<\/p>\n
Question 8.
\nDifferentiate in the followings:
\n(a) Monera and Protista
\n(b) Bryophytes and pteridophytes
\n(c) Monocots and dicots
\n(d) Mollusca and echinodermata
\n(e) Chordata and non-chordata
\n(f) Cartilaginous and bony fishes
\n(g) Platyhelminthes and nematoda
\nAnswer:<\/p>\n
\n\n\nMonera<\/td>\n | Protista<\/td>\n<\/tr>\n |
\n1. They have prokaryotic cells.<\/td>\n | They have eukaryotic cells.<\/td>\n<\/tr>\n |
\n2. They are autotrophic, parasitic or free living.<\/td>\n | They are autotrophic, parasitic or free living.<\/td>\n<\/tr>\n |
\n3. Example: Bacteria, Mycoplasm<\/td>\n | Example: Protozoa and algae like chlamydomonas.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n (b) Bryophytes and pteridophytes \n<\/p>\n (c) Monocots and dicots \n<\/p>\n (d) Mollusca and echinodermata \n<\/p>\n (e) Chordata and non-chordata<\/p>\n \n\n\nChordates<\/td>\n | Nonchordates<\/td>\n<\/tr>\n | \n1. They show the presence of notochord in any stage of their life.<\/td>\n | 1. They do not posses notochord in any stage of their life.<\/td>\n<\/tr>\n | \n2. Central nervous system is hollow and dorsal.<\/td>\n | 2. Central nervous system is solid and ventral.<\/td>\n<\/tr>\n | \n3. Heart is always ventral.<\/td>\n | 3. Heart if present is dorsal.<\/td>\n<\/tr>\n | \n4. They have haemoglobin present in red blood cells.<\/td>\n | 4. They have haemoglobin or any other respiratory pigment present dissolved in blood plasma.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n (f) Cartilaginous and bony fishes \n \n<\/p>\n (g) Platyhelminthes and Nematoda \n<\/p>\n Question 9. \nList some of the important characteristics of protochordates. \nAnswer: \nThe protochordates are primitive to chordates.<\/p>\n | |