24277 + Interview Questions in Biology in Class 12 Page 161 InterviewSolution

8001.	Question : Sperm takes………….hour to enter into the oviduct from uterus.
Answer» 2 to 3 4 to 5 2 to 4 5 to 6 Answer :D

Discussion

8002.	Question : Sperm motility occur due to activation of the sperm by the viscous liquid. The liquid is secreted by-
Answer» SECRETORY CELLS of the epithelial LINING of genital tract Sperm itself Egg cell Connective tissue of uterus Answer :A

Discussion

8003.	Question : Sperm of animal species A cannot fertilize ovum of species B because .
Answer» Antifertilizin of A and B are not compatible. Antifertilizin of A and FERTILIZIN of B are not compatible. Fertilizin of A and B are not compatible None of above Answer :B

Discussion

8004.	Question : Sperm cell and ovum (egg) cell
Answer» SOLUTION :

Discussion

8005.	Question : Sperm differs from egg in having :-
Answer» POWER of MOTILITY No STORED food More in numbers All of the above Answer :D

Discussion

8006.	Question : Sperm cells of angiosperms differ from the rest of the plant groups like gymnosperms by
Answer» In ANGIOSPERMS the sperm cells are non MOTILE whereas in the other they are flagellate In angiosperms the sperm cells are produced in the POLLEN grain whereas in the REST they are produced in the antheridium In angiosperms and gymonsperms the sperm cells and are non motile whereas in the rest they are flagellated None of the above Answer :D

Discussion

8007.	Question : Spending the dry hot period in an inactive state by an animal is:
Answer» CAMOUFLAGE Aestivation Hibernation Mullerian mimicry Answer :B

Discussion

8008.	Question : Speed of impulse on nerves in mammals is :
Answer» 1 meter/sec. 100 meter/sec. 1000 meter/sec. NONE of these Answer :B

Discussion

8009.	Question : Specify the type of interactions between the given pair of species. (a) Spanish moss and Oak tree (b) Cuscuta and Acacia ( c ) Nepenthes and Ants (d) Alga and fungus
Answer» SOLUTION :(a) COMMENSALISM (B) PARASITISM (c) Predation (d) Mutualism

Discussion

8010.	Question : Specific sequences of mRNA that are not translated are ………………
Answer» SOLUTION :UNTRANSLATED REGIONS (UTR)

Discussion

8011.	Question : Specific opioid receptors are present in
Answer» ANS only GASTROINTESTINAL TRACT only CNS and gastrointestinal tract Damaged or INJURED organs Answer :C

Discussion

8012.	Question : Specific absorption of light by a molecule over a series of wavelength is called _____
Answer» ANSWER :ABSORPTION SPECTRUM

Discussion

8013.	Question : Species that can tolerate wide range of salinityare called ............
Answer» SOLUTION :EURYHALINE SPECIES.

Discussion

8014.	Question : Species that can tolerate narrow range of temperature are called ……...
Answer» SOLUTION :Stenothermic SPECIES are the organisms which RESTRICTS themselves to a NARROW range of temperature.

Discussion

8015.	Question :Species originate discontinuously without intermediate forms according to
Answer» Lamarck de VRIES Darwin Haeckel ANSWER :B

Discussion

8016.	Question : Species occurring in different geographical areas are called
Answer» SIBLING Neopatric SYMPATRIC ALLOPATRIC ANSWER :D

Discussion

8017.	Question : Species is a
Answer» Group IMMEDIATELY below a phylum CLOSELY RELATED interbreeding population Taxonomic division of similar general Closely related non-breeding population Answer :B

Discussion

8018.	Question : Species inhabiting the same geographical areas are known as:
Answer» ALLOPATRIC SPECIES SYNCHRONIC species Allochronic species SYMPATRIC species SOLUTION :Sympatric species

Discussion

8019.	Question : Species facing competition might evolve mechanism that promotes coexistence rather than exclusion. Justify this statement in light of Gause' s competitive exclusion principle, citing suitable examples.
Answer» Solution :Gause.s .Competitive Exclusion Principle. states that two closely related species competing for the same resources cannot co-exist indefinitely and the COMPETITIVELY inferior one will be ELIMINATED eventually. This may be true if resources are limiting, but not otherwise. More recent studies do not SUPPORT suchgross generalizations about competition. While they do not rule out the occurrence of interspecific competition in nature, they point out that species facing competition might evolve mechanisms that promote co-existence rather than exclusion. One such mechanism is .RESOURCE partitioning.. If two species compete for the same resource, they could AVOID competition by choosing, for instance, different times for feeding or different foraging patterns. MacArthur showed that five closely related species of warblers living on the same tree were able to avoid competition and co-exist due to behavioral differences in their foraging activities.

Discussion

8020.	Question :Species introduced deliberately in an area are referred as............
Answer» ENDEMIC SPECIES Vulnerable specie Exotic specie Extinct species ANSWER :A

Discussion

8021.	Question : Species diversity of plants is much less then that of animals.
Answer» Solution :The species diversity of PLANTS is much less than that of animals because most animals possesses nervous system that control & coordinate various activities of animals. They ALSO possess receptors to receive environmental stimuli. Some of these RESPONSES are adaptive & ensure survival of ORGANISM in changing environmental conditions.

Discussion

8022.	Question : Species diversity is lowest in ecosystem
Answer» Desert Tundra Grassland Deciduous FOREST ANSWER :B

Discussion

8023.	Question :Species diversity means _______________
Answer» Number of SPECIES Species composition RELATIVE abundance of species GENETIC diversities Answer :C

Discussion

8024.	Question :Species diversity is the product / outcome of :
Answer» Species RICHNESS Species evenness Both ( A ) and ( B ) BIOMASS of species Answer :C

Discussion

8025.	Question : Species diversity increase :-
Answer» LOW ALTITUDE to HIGH altitude and from low LATITUDE to high latitude High altitude to low altitude, and from high latitude to low latitude High altitude to low altitude, and from low latitude to high latitude Low altitude to high altitude, and from high latitude to low latitude Answer :B

Discussion

8026.	Question : Species diversity decreases from equator towards poles.Ecologists proposed various hypotheses.Suggest two hypotheses for this phenomenon.
Answer» Solution :Equator has FAVOURABLE conditions for GROWTH throughout the year. E.g., constant environment with less seasonal VARIATION, more solar energy. Decrease in temperature and greater seasonal variations are the cause of less species diversity in poles.

Discussion

8027.	Question : Species diversity decreases as we move away from the equator towards the poles. What could be the possible reasons ?
Answer» Solution :In GENERAL, species diversity decreases as we move away from the EQUATOR towards the poles. The possible reason could be as follows : (i) Temperature decreases as we move away from the equator towards the poles. (ii) The intensity of SUN light decreases as we move away from the equator towards the poles and hence productivity. (III) In polar regions the temperature is very low so most of the organisms cannot survive in that habitat.

Discussion

8028.	Question : Species diversity in an area is important for :
Answer» RESISTANCE PRODUCTIVITY STABILITY All of these Answer :D

Discussion

8029.	Question : Species can be identified on the basis of
Answer» INTERBREEDING Species diversity REPRODUCTIVE isolation None of these ANSWER :C

Discussion

8030.	Question : Speciation within same areas by reproductive isolation is:
Answer» Sympatric Allopatric Transformational All of these Answer :A

Discussion

8031.	Question : Speciation occurs when
Answer» population are REPRODUCTIVELY ISOLATED population are isolated by geographical barrier Both the above None of these Answer :B

Discussion

8032.	Question : Speciation as a smallseries of changes thataccumulate over time, ia known as
Answer» punchuated eequilibrium cladistics gradualism stasis Answer :C

Discussion

8033.	Question : What is the term used for the large specialized cell present in Cyanobacteria which is responsible for nitrogen fixation?
Answer» DINOFLAGELLATES Chrysophytes Euglenoids Cyanobacteria Answer :D

Discussion

8034.	Question : Specialised tissue found in endosperm of cereals which secretes enzymes ………….. .
Answer» SOLUTION :ALEURONE TISSUE

Discussion

8035.	Question : Special kind of evolution has brought the similarity as seen in fins of fishes and flippers of dolphins .Give reasons . Also name the kind of evolution also.
Answer» SOLUTION :Convergent EVOLUTION has brought the similarity in the FINS of fishes and flippers of dolphins because these are analogous ORGANS . There are quite different in FUNDAMENTAL structure and embryonic origin but have been modified to perform same function in aquatic habitats

Discussion

8036.	Question : Special feature of Bt- cotton plant
Answer» The plant is completely RESISTANT to insects Requires LEE fertilizers It's LEAF is resistant to pest but BOLL is destroyed by bollworms This plant is resistant to certain insects Solution :This plant is resistant to certain insects

Discussion

8037.	Question : Spatial pattern determined by the height of plants is called ……….. .
Answer» zonation stratification speciation succession Answer :B

Discussion

8038.	Question : Spadix is a type of :-
Answer» Aestivation Placentation Fruit Inflorescence Answer :D

Discussion

8039.	Question : Spathy bract is characteristic of ……………inflorescence
Answer» umebl SPADIX RACEME AMENTUM ANSWER :B

Discussion

8040.	Question : Space between the two membranes of nuclear envelope is called
Answer» Pericentriolar SPACE Lumina! space Perinuclear space Intranuclear space ANSWER :C

Discussion

8041.	Question : Soyabean exports the fixed nitrogen as :-
Answer» NH3 AMINO ACID UREIDES ANSWER :D

Discussion

8042.	Question : Southern blotting is done for :
Answer» DNA RNA m - RNA Protein Answer :A

Discussion

8043.	Question : Southern blotting can't be performed without :
Answer» RESTRICTION endonucleases Agarose Monoclonal antibodies BOTH (A) AND (B) ANSWER :D

Discussion

8044.	Question : Southern blot technique is related to
Answer» DNA profiling WIDAL TEST ELISA test blood test Answer :A

Discussion

8045.	Question : Source of turgor in plant cell is:
Answer» Air Water Hormones All of these Answer :B

Discussion

8046.	Question :Source of protons necessary for the reduction of NADP^(+) is
Answer» `H_(2)O`which UNDERGOES OXIDATION ` PQH_(2)`which undergoes oxidation `H^(+)`PICKED up by `PQ^(-)` ` H^(+)` POOL of stroma Answer :A

Discussion

8047.	Question : Source of mendelian recombinations is
Answer» Linkage Independent assortment Mutations Dominant traits Answer :B

Discussion

8048.	Question : Source of minerals to young leaves
Answer» MINERALS ABSORBED by ROOT hairs Senescent leaves Minerals PRESENT in the atmosphere 1 and 2 Answer :D

Discussion

8049.	Question : Sourceof hydrogen for the reduction of acetaldehyde into ethyl alcohol in anaerobic respiration is
Answer» `FADH_(2)` `NADPH_(2)` `NADH_(2)` TPP Answer :C

Discussion

8050.	Question : Source of agar is……………….
Answer» SOLUTION :MARINE ALGAE (SEA WEEDS)

Discussion

Explore topic-wise InterviewSolutions in .

Question : Sperm takes………….hour to enter into the oviduct from uterus.

Question : Sperm motility occur due to activation of the sperm by the viscous liquid. The liquid is secreted by-

Question : Sperm of animal species A cannot fertilize ovum of species B because .

Question : Sperm cell and ovum (egg) cell

Question : Sperm differs from egg in having :-

Question : Sperm cells of angiosperms differ from the rest of the plant groups like gymnosperms by

Question : Spending the dry hot period in an inactive state by an animal is:

Question : Speed of impulse on nerves in mammals is :

Question : Specify the type of interactions between the given pair of species. (a) Spanish moss and Oak tree (b) Cuscuta and Acacia ( c ) Nepenthes and Ants (d) Alga and fungus

Question : Specific sequences of mRNA that are not translated are ………………

Question : Specific opioid receptors are present in

Question : Specific absorption of light by a molecule over a series of wavelength is called _____

Question : Species that can tolerate wide range of salinityare called ............

Question : Species that can tolerate narrow range of temperature are called ……...

Question :Species originate discontinuously without intermediate forms according to

Question : Species occurring in different geographical areas are called

Question : Species is a

Question : Species inhabiting the same geographical areas are known as:

Question : Species facing competition might evolve mechanism that promotes coexistence rather than exclusion. Justify this statement in light of Gause' s competitive exclusion principle, citing suitable examples.

Question :Species introduced deliberately in an area are referred as............

Question : Species diversity of plants is much less then that of animals.

Question : Species diversity is lowest in ecosystem

Question :Species diversity means _______________

Question :Species diversity is the product / outcome of :

Question : Species diversity increase :-

Question : Species diversity decreases from equator towards poles.Ecologists proposed various hypotheses.Suggest two hypotheses for this phenomenon.

Question : Species diversity decreases as we move away from the equator towards the poles. What could be the possible reasons ?

Question : Species diversity in an area is important for :

Question : Species can be identified on the basis of

Question : Speciation within same areas by reproductive isolation is:

Question : Speciation occurs when

Question : Speciation as a smallseries of changes thataccumulate over time, ia known as

Question : What is the term used for the large specialized cell present in Cyanobacteria which is responsible for nitrogen fixation?

Question : Specialised tissue found in endosperm of cereals which secretes enzymes ………….. .

Question : Special kind of evolution has brought the similarity as seen in fins of fishes and flippers of dolphins .Give reasons . Also name the kind of evolution also.

Question : Special feature of Bt- cotton plant

Question : Spatial pattern determined by the height of plants is called ……….. .

Question : Spadix is a type of :-

Question : Spathy bract is characteristic of ……………inflorescence

Question : Space between the two membranes of nuclear envelope is called

Question : Soyabean exports the fixed nitrogen as :-

Question : Southern blotting is done for :

Question : Southern blotting can't be performed without :

Question : Southern blot technique is related to

Question : Source of turgor in plant cell is:

Question :Source of protons necessary for the reduction of NADP^(+) is

Question : Source of mendelian recombinations is

Question : Source of minerals to young leaves

Question : Sourceof hydrogen for the reduction of acetaldehyde into ethyl alcohol in anaerobic respiration is

Question : Source of agar is……………….