24277 + Interview Questions in Biology in Class 12 Page 92 InterviewSolution

4551.	Question : The stimulusresponsible for vernalizationis
Answer» Phytochrome VERNALIN FLORIGEN NONEOF these Answer :B

Discussion

4552.	Question : The stimulus of photoperiodism is perceived by
Answer» Leaves Shoot apex Lateral meristem Flowers Answer :A

Discussion

4553.	Question : The 'sticky' end of a fragmented DNA molecule are made of
Answer» calcium SALTS endonuclease unpaired bases METHYL GROUPS Answer :C

Discussion

4554.	Question : The sterile region of female reproductive part of the flower is known as….A. StigmaB. StyleC. OvuleD. Ovary
Answer» Stigma Style Ovule Ovary Answer :B

Discussion

4555.	Question : The sterile female honey bees are called what ?
Answer» ANSWER :WORKERS

Discussion

4556.	Question : The step in glycose-6-phosphate
Answer» Glucose`to`Glucose-6-phosphate 2-phosphoglycerate`to`PHOSPHOENOL pyruvate Pyruvate`to`Acetyl Co-A Fructose-1,6-diphosphate`to`DIHYDROXY ACETONE phosphate Solution :NA

Discussion

4557.	Question : The stem of submerged water plant is soft and weak because
Answer» They are ABSOLUTELY DEVOID of XYLEM They TOTALLY lack PHLOEM They do not have stomata Supporting tissue and xylem are feebly developed Answer :D

Discussion

4558.	Question :The stem may function as :-
Answer» Conducting water, minerals and photosynthates STORAGE of food, support, PROTECTION and VEGETATIVE propagation Spreading out BRANCHES, bearing leaves, flowers and fruits All of the above Answer :D

Discussion

4559.	Question : The stele of a dicot stem includes all,except
Answer» VASCULAR bundles Pericycle pith Endodermis Answer :B

Discussion

4560.	Question : The statemnets given below describe certain features that are observed in the pistil of flowers.(i) Pistil may have many carpels.(ii) Each carpel may have more than one ovule.(iii) Each carpel has only one ovule. (iv) Pistil have only one carpel.Choose the statements that are true from the options below :(A) i and ii(B) i and iii(C) ii and iv(D) iii and iv
Answer» i and ii i and III ii and IV iii and iv Solution :Pistil may have many carpels (multicapillary pistil like Papaver). Each carpel may have more than one OVULE (like WATERMELON, Papaya etc.)

Discussion

4561.	Question : The statement which is true for Agaricus is
Answer» The primary mycelia of Agaricus is long LIVED The secondary mycelium in Agaricus is formed as a result of karyogamy CLAMP connection aid in the FORMATION of tertiary mycelium Basidiocarp in Agaricus CONSISTS of umbrella-shaped stipe and fleshy stalk PILEUS Answer :C

Discussion

4562.	Question : The statement "Nothing in biology makes sense except in the light of evolution" was given by
Answer» THEODOSIUS Dobzhansky Charles Darwin Alfred RUSSEL Wallace Joseph Hooker Answer :A

Discussion

4563.	Question : The state, during which the respiratory centre is inhibited, is termed as
Answer» anoxia asphyxia SUFFOCATION CHOKING ANSWER :A

Discussion

4564.	Question : The stage that implants in the uterine endometrium initially
Answer» Zygote Morula Blastula Blastocyst Answer :D

Discussion

4565.	Question : The stage of suspended development shown by zooplanktons is called
Answer» DESICCATION Diapause Hibernation Homeostasis Answer :B

Discussion

4566.	Question : The stage of Plasmodium falciparum infective to humans are formed in the
Answer» LIVER of human RBCS of mosquito salivary GLANDS of mosquito intestine of human ANSWER :C

Discussion

4567.	Question : The stage of Ornithine cycle at which arginase enzyme is used is
Answer» Omithine `to` citrulline Arginine `to` Omithine Citulline `to` Arginosucoinic acid Omithine `to` UREA ANSWER :B

Discussion

4568.	Question : The stage between two meiotic divisions is called:
Answer» Interphase Cytokinesis Interkinesis Karyokinesis Answer :C

Discussion

4569.	Question : The stable inheritance of a gene through generations is known as
Answer» DNA typing Forensic ANALYSIS PEDIGREE analysis Anthropological studies Answer :C

Discussion

4570.	Question : The spring wood is ...‘A’... in colour and has a ...‘B’... density, whereas the autumn wood is ...‘C’... in colour and has a ...‘D’... density. In above paragraph, A, B, C and D are respectively.
Answer» LIGHTER, LOWER, DARKER, HIGHER Lighter, higher, darker, lower Darker, lower, lighter, higher Darker, higher, lighter, lower Answer :A

Discussion

4571.	Question : The spreading of cancer cell in the body is known as ?
Answer» Mutation METASTASIS Uncurable TUMOR carcinogen Solution :Metastasis

Discussion

4572.	Question : The sporozoites that cause infection when a female Anopheles mosquito bites a person, are formed in
Answer» LIVER of the person RBCs of mosquito salivary glands of mosquito gut of mosquito Solution :The sporozoites that cause infection, when a FEMALE ANOPHELES mosquito bites a person being are produced in intestine of mosquito. Sporozoites reaches the liver of a person through blood. RBC of mosquito is not related with these STAGES. Sporozoite migrate to the salivary glands of mosquito.

Discussion

4573.	Question : The sporophyte of mosses is :
Answer» Parasite Semiparasite Free living Differentiated in root, STEM and LEAVES ANSWER :B

Discussion

4574.	Question : The sporophyte of mosses is:-
Answer» Parasite Semiparasite Free living Differentiated in ROOT, STEM and leaves Answer :B

Discussion

4575.	Question : Thesporangia of Selaginella are aggregated in
Answer» atrobilus gametophyte prothallus None of these ANSWER :A

Discussion

4576.	Question : The sporozoite of the material parasite is present in ___
Answer» saliva of INFECTED FEMALE Anophels mosquito RBC of HUMAN SUFFERING from malari Spleen of infected humans Gut of female anopheles mosquito ANSWER :A

Discussion

4577.	Question :The splitting of water molecule is associated with
Answer» Photosystem I Photosystem II CYTOCHROMES COMPLEX Coupling factor Answer :B

Discussion

4578.	Question : The spindle formed in the dividing plant cell is ___
Answer» ANSWER :Anastral

Discussion

4579.	Question : The spindle fibres during prophase are organised with the help of
Answer» HISTONE PROTEINS and kinetochores cyclins and mitogens calcium BINDING proteins CALLED calmodulin actin and myosin. Answer :C

Discussion

4580.	Question : The spindle fibre are attached to the ____ of the chromosme.
Answer» SOLUTION :CENTROMERE

Discussion

4581.	Question : The spinal cord is the posterior continuationof mesencephalon.
Answer» Answer :The SPINAL CORD is the posterior CONTINUATION of medulla OBLONGATA.

Discussion

4582.	Question : The spermatogonia undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.
Answer» Spermatogonia have 46 chromosomes and always undergo meiotic cell division PRIMARY spermatocytes divideby mitotic cell division SECONDARY spermatocytes have 23 chromosomes and undergo second meiotic division Spermatozoa are transformed into spermatids Solution :In testis immature male gametes produce sperms by the process of spermatogenesis. The spermatogonia present on the inside WALL of seminiferous tubules multiply by mitotic division and increase in numbers. Gamete CELLS located in germinal epithelium are diploid and possess46 chromosomes. Diploid cells of germinal epithelium are also known are primary spermatocyte periodically undergo meiosis andproduces two equal cells. They are called secondary spermatocytes which have only 23 chromosomes each. The secondary spermatocytes undergo the second meiotic division to produce four equal haploid spermatids. The spermatids are transformed into spermatozoa by the process called spermiogenesis.

Discussion

4583.	Question : The spermatids are transformed into spermatozoa by the process called spermiogenesis.
Answer» Solution :Spermatids are not complete for movement by the structural point of VIEW which needs to be PUSHED till ovarian duct by vagina. So by this process it gets TAIL like structure. More over in the entry to ovum head middle part like structure also FORMS during this process.

Discussion

4584.	Question : The sperm produce some enzymes known as "sperm lysin" which helps in-
Answer» Spermatogenesis Viability of SPERM PENETRATION of sperm Movement of sperm Answer :C

Discussion

4585.	Question : The sperm gets matured in:
Answer» Testis Leydig's CELL FEMALE GENITAL tract Vas deferens Answer :C

Discussion

4586.	Question : The spectralqualityof solarradiation is important to lifejustify thisstatement.
Answer» SOLUTION :the UVcomponentof thespectrumis harmfulto MANY ORGANISMS .themarineplantsare adaptedto usethe selectedcolursof visiblespectrumbecausethey RECEIVE only certaincolours at variousdepthof the OCEANS.

Discussion

4587.	Question : The specific relationship between a legume and its mutualistic Rhizobium strain probably depends on
Answer» each legume having a chemical DIALOGUE with a fungus. each RHIZOBIUM strain having a form of nitrogenase that works only in the APPROPRIATE legume host. each legume being found where the soil has only the Rhizobium specific to that legume. specific recognition between the chemical signals and signal RECEPTORS of the Rhizobium strain and legume species. Answer :D

Discussion

4588.	Question : The species used as natural genetic engineer is :
Answer» AGROBACTERIUM tumefaciens Bacillus thuringiensis Aspergillus Drosophila Answer :A

Discussion

4589.	Question : The species that invade a nude area are called _____ species.
Answer» SOLUTION :PIONEER SPECIES

Discussion

4590.	Question : The species that invade a bare area is .......
Answer» Angiospermic plant HYDROPHYTE PIONEER SPECIES Climax Species SOLUTION :Pioneer species

Discussion

4591.	Question : The species of plants that play a vital role in controlling the relative abundance of other species in a community are called
Answer» EDGE species keystone species pioneer species seral species Answer :B

Discussion

4592.	Question : The species invading an area in secondary succession depends upon
Answer» Soil CONDITION WATER availability Seed or propagules present All of the above Solution :All of the above

Discussion

4593.	Question : The species of insect very common in apiculture is
Answer» apisindica apisdorsata both a&b none of the above ANSWER :A

Discussion

4594.	Question : The species diversity of plants (22 per cent) is much less than that of animals (72 per cent). What could be the explanations to how animals achieved greater diversification ?
Answer» SOLUTION :The following initiatives can be taken to prevent environmental pollution : MEASURE for preventing air pollution : (i) Planting more trees. (ii) Use of clean and renewable energy sources such as CNG and bio-fuels. (iii) Reducing the use of fossil fuels. (iv) Use of catalytic converters in automobiles. Measure for preventing water pollution : (i) Optimizing the use of water. (ii) Using kitchen waste water in gardening and other household purposes. Measure for controlling NOISE pollution : (i) Avoid burning crackers on Diwali. (ii) Plantation of more trees. Measures for decreasing solid waste generation : (i) SEGREGATION of waste. (ii) Recycling and reuse of plastic and paper. (iii) Composting of biodegradable kitchen waste. (iv) Reducing the use of PLASTICS.

Discussion

4595.	Question : The species diversity of plants(22%) is much less than that of animals(72%) What could be the explanation of how animals achieved greater diversification?
Answer» Solution :The higher % o SPECIES diversity AMONG animals is due to their MOVEMENT to diverse habitats. As a result more evolutionary changes OCCURRED in animals than in plants.

Discussion

4596.	Question : The species diversity of plants on earth will be
Answer» 0.024 0.22 0.081 0.85 Answer :B

Discussion

4597.	Question : The species diversity of plants (22 per cent) is much less than that of animals (72 per cent). What could be the explanations to how animals achieved greater diversification?
Answer» Solution :The great structural and resource heterogeneity provided by plants is the principal REASON of HIGH animal diversity. A single PLANT SPECIES can accommodate many animal species.

Discussion

4598.	Question : The species area relationship studied by Alexander Von Humboldt is a straight line on a logarithmicscale and is represented by equation : Log S = Log C + Z log A In this equation 'Z' stands for :
Answer» SPECIES richness AREA Regression COEFFICIENT Y-intercept ANSWER :C

Discussion

4599.	Question : The species confined to a particular region and not found elsewhere is termed as :
Answer» Rare KEY stone ALIEN ENDEMIC SOLUTION :Endemic

Discussion

4600.	Question : the speciesdiversityof planton earthwill be
Answer» `2.4%` `22%` `8.1%` `85%` ANSWER :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : The stimulusresponsible for vernalizationis

Question : The stimulus of photoperiodism is perceived by

Question : The 'sticky' end of a fragmented DNA molecule are made of

Question : The sterile region of female reproductive part of the flower is known as….A. StigmaB. StyleC. OvuleD. Ovary

Question : The sterile female honey bees are called what ?

Question : The step in glycose-6-phosphate

Question : The stem of submerged water plant is soft and weak because

Question :The stem may function as :-

Question : The stele of a dicot stem includes all,except

Question : The statement which is true for Agaricus is

Question : The statement "Nothing in biology makes sense except in the light of evolution" was given by

Question : The state, during which the respiratory centre is inhibited, is termed as

Question : The stage that implants in the uterine endometrium initially

Question : The stage of suspended development shown by zooplanktons is called

Question : The stage of Plasmodium falciparum infective to humans are formed in the

Question : The stage of Ornithine cycle at which arginase enzyme is used is

Question : The stage between two meiotic divisions is called:

Question : The stable inheritance of a gene through generations is known as

Question : The spring wood is ...‘A’... in colour and has a ...‘B’... density, whereas the autumn wood is ...‘C’... in colour and has a ...‘D’... density. In above paragraph, A, B, C and D are respectively.

Question : The spreading of cancer cell in the body is known as ?

Question : The sporozoites that cause infection when a female Anopheles mosquito bites a person, are formed in

Question : The sporophyte of mosses is :

Question : The sporophyte of mosses is:-

Question : Thesporangia of Selaginella are aggregated in

Question : The sporozoite of the material parasite is present in ___

Question :The splitting of water molecule is associated with

Question : The spindle formed in the dividing plant cell is ___

Question : The spindle fibres during prophase are organised with the help of

Question : The spindle fibre are attached to the ____ of the chromosme.

Question : The spinal cord is the posterior continuationof mesencephalon.

Question : The spermatogonia undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.

Question : The spermatids are transformed into spermatozoa by the process called spermiogenesis.

Question : The sperm produce some enzymes known as "sperm lysin" which helps in-

Question : The sperm gets matured in:

Question : The spectralqualityof solarradiation is important to lifejustify thisstatement.

Question : The specific relationship between a legume and its mutualistic Rhizobium strain probably depends on

Question : The species used as natural genetic engineer is :

Question : The species that invade a nude area are called _____ species.

Question : The species that invade a bare area is .......

Question : The species of plants that play a vital role in controlling the relative abundance of other species in a community are called

Question : The species invading an area in secondary succession depends upon

Question : The species of insect very common in apiculture is

Question : The species diversity of plants (22 per cent) is much less than that of animals (72 per cent). What could be the explanations to how animals achieved greater diversification ?

Question : The species diversity of plants(22%) is much less than that of animals(72%) What could be the explanation of how animals achieved greater diversification?

Question : The species diversity of plants on earth will be

Question : The species diversity of plants (22 per cent) is much less than that of animals (72 per cent). What could be the explanations to how animals achieved greater diversification?

Question : The species area relationship studied by Alexander Von Humboldt is a straight line on a logarithmicscale and is represented by equation : Log S = Log C + Z log A In this equation 'Z' stands for :

Question : The species confined to a particular region and not found elsewhere is termed as :

Question : the speciesdiversityof planton earthwill be