24277 + Interview Questions in Biology in Class 12 Page 439 InterviewSolution

21901.	Question : Animals have the innate ability to escape from Predatlon. Examples for the same are given below. Select the Incorrect example.
Answer» Colour change in Chameleon Enlargement of BODY size by swallowing air in PUFFER fish POISON fangs in SNAKES MELANISM in moths Solution :Poison fangs in snakes

Discussion

21902.	Question : Animals having both male and female reproductive organ are called what ?
Answer» ANSWER :Bisexual/Hermaphrodite/Monoecious

Discussion

21903.	Question : Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example,
Answer» COLOUR change in chameleon Enlargement of BODY SIZE by swallowing air in puffer fish Poison fangs in snakes Melanism in MOTHS ANSWER :C

Discussion

21904.	Question : Animals giving birth to young ones are
Answer» Oviparous Ovoviviparous viviparous both B and C ANSWER :D

Discussion

21905.	Question : Animals giving birth to young ones are:
Answer» OVIPAROUS Ovoviviparous Viviparous Both(B) and (C) ANSWER :C

Discussion

21906.	Question : Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect examples:
Answer» COLOUR change in chameleon Melanism in moths Poison FANGS in snakes Enlargement of body SIZE by swallowing air in puffer fish Answer :C

Discussion

21907.	Question : Animals giving birth to young ones are ...................
Answer» Oviparous Ovoviviparous VIVIPAROUS Both a and b Solution :Viviparous

Discussion

21908.	Question : Animal used by Dr. Lalji Singh to develop DNA finger printing technique.
Answer» SOLUTION :FEMALE BANDED KRAIT SNAKE.

Discussion

21909.	Question : Animal species should be protected because they are
Answer» LOVELY creatures Useful to humans To be STUDIED by Zoologists Man can not RECREATE a LOST species Answer :D

Discussion

21910.	Question : Animals of which habitat are mostly uricoltelic?
Answer» Terrestial Aerial none of these Aquatic Answer :TERRESTRIAL DRY and ACID

Discussion

21911.	Question : Which habitat's animals are mostly ammonotelic ?
Answer» AQUATIC Terrestial Aerial None of the above Answer :Aquatic

Discussion

21912.	Question : Animal husbandry is
Answer» Agricultural practice of BREEDING and raising the livestock Deals with care and breeding of livestock LIKE BUFFALOES, cows, pigs, horses, sheep, goat etc Is a vital skill for farmers and is as much science as it is an ART All of these Answer :D

Discussion

21913.	Question : Animal husbandry deals with
Answer» Only CARING of LIVESTOCK Only BREEDING of livestock Both caring and breeding of livestock Slaughtering of livestock Answer :C

Discussion

21914.	Question : Animal husbandry and plallL LJreedillg programmes are the examples of
Answer» REVERSE evolution artificial selection mutation natural selection Solution :Animal husbandry and plant breeding programmes are the examples of artificial selection where the breeder CHOOSES to perpetuate only CERTAIN desirable inheritable characters. Reverse Evolution is the NOTION that species can REVERT to supposedly more primitive forms over time. Natural selection is the process by which heritable traits increase an organism.s chances of survival and reproduction.

Discussion

21915.	Question : Animal husbandry and plant breeding programmers are the examples of
Answer» reverse evolution artifical selection Mutation and natural selection. natural selectron. Solution :Animal husbandry and plant BREEDING programmes are the exmples of artificil selection. The artifical selection is the modification of species by selective breeding. Animals or plants with desirable characterstics are interbred with the aim of ALTERING the genotype and producing a new strain of the ORGANISM for a specific PURPOSE. Traditional breeding techniques have been supplemented by more recent methods of genetic engineering. genetic testing and embryo methods of geneticengineering, genetic testing and embryo manipulation. Sequencing of genomes of commercially important animals and plant species has enabled the inheritance of desired genes to be MONITORED directly by molecular methods.

Discussion

21916.	Question : Angstrom (Å) is equal to
Answer» `0.01 MU m ` `0.001 MUM ` `0.0001 mu m ` `0.00001mu m ` SOLUTION :ANGSTROM (Å) = `0.0001 mu m ` 1 Å = `10^(-10) M = 10^(-8) cm = 10^(-7) NM = 10^(-4) mu`

Discussion

21917.	Question : angona wool is obtained from
Answer» Sheep RABBIT YAK Goat ANSWER :B

Discussion

21918.	Question : Animal and plants are best protected in :
Answer» Zoo Botanical garden Sanctuaries National park Answer :D

Discussion

21919.	Question : Angiotensin-II stimulates pancreas.
Answer» True False Answer :CORTEX

Discussion

21920.	Question : Angiotensin-ll is responsible for all of the following except
Answer» Vasoconstriction Increase in BLOOD pressure Release of mineralocorticoids Decreased REABSORPTION of `NA^+` from RENAL tubules Answer :D

Discussion

21921.	Question :Angiotensin II is
Answer» a VASOCONSTRICTOR a vasodilator ACTIVATING ADRENAL medulla DECREASING GFR Answer :A

Discussion

21922.	Question : Angiosperms produce male and female reproductive structures in which male and female gametophytes and gametes are produced . (a) Name the male andfemale reproductive structure . (b) Name the male and female gametophytes .
Answer» SOLUTION :(a) The male reproductive structure is anther and the female reproductive structure is pistil . (B) The male gametophyte is the mature pollen grain and the female gametophyte is EMBRYOSAC.

Discussion

21923.	Question : Angina pectoris is
Answer» CONGESTION in lungs acute CHEST pain obstruction in BLOOD flow heart failure Answer :B

Discussion

21924.	Question : ANF, Is secrets by
Answer» Venous wall of heart atrial wall of heart Both (1) and (2) NONE of these Answer :B

Discussion

21925.	Question : ANF' is a hormone ,Which
Answer» is SECRETED when BP is INCREASED DECREASES BP Causes vasodilation All of above Answer :D

Discussion

21926.	Question : Angina pectoris.
Answer» Solution :(1)Angina pectoris is the pain the chest.It results from a reduction in blood supply to cardiac muscle due to NARROWED and hardened aoronary arteries.(2)Atherosclerosis and arteriosclerosis can cause this problem.Basically the CORONARY arteries are affected during angina pectoris.(3)It causes heaviness and severe pain in the chest.THe pain can ALSO be felt at the neck,lower jaw,LEFT jaw,left arm and left shoulder.(4)Angina pectoris often occurs during exertion,when the heart demands more oxygen and narrowed blood vessels cannot supply.It disappears with rest.

Discussion

21927.	Question : ANF' is
Answer» STEROIDAL in nature Peptide hormone Glucocorticoid hormone Mineralocorticold hormone Answer :B

Discussion

21928.	Question : Aneuploidy is :
Answer» n-1 3n 2n-1 n+1 Answer :C

Discussion

21929.	Question : Anemophily is pollination affected by :
Answer» WATER CURRENT Birds Wind Insect Answer :C

Discussion

21930.	Question : Anemophilous flowers produce abundant pollen grains . Give reason.
Answer» Solution :Anemophily is a chance event. The liberated pollen may not REACH the TARGET flower and are wasted during the transmission from one flower to another . Hence enormous pollen grains are PRODUCED to assure POLLINATION.

Discussion

21931.	Question : Anemophily means :
Answer» POLLINATION by wind Pollination by birds Pollinationby animals Animal LOVING plants Answer :A

Discussion

21932.	Question : Anemophilous flowers are colourless and non - scented . What may be the reason ?
Answer» Solution :Production of coloured and scented flowers are to attract the pollinating agents . Where as wind ACTS as a pollinating agent for anemophilous flowers . Hence it is UNNECESSARY to PRODUCE coloured and scented flowers.

Discussion

21933.	Question : Androgens are produced by Sertoli cells. [True / False ]
Answer» SOLUTION :ANDROGENS are PRODUCED by LEYDIG CELLS.

Discussion

21934.	Question : Anemophilous flowers have :
Answer» SESSILE stigma Small SMOOTH stigma Coloured flower Large FEATHERY stigma Answer :D

Discussion

21935.	Question : Anemophilous flowers
Answer» Are not packed into inflorescence Have OVARIES with single or few ovules Are always BRIGHT COLOURED Prorduce small number of pollen grains Solution :Pink flower of SNAPDRAGON is observed due to incomplete dominance of flower colour GENE (heterozyugous condition)

Discussion

21936.	Question : Androgens are produced by Sertoli cells. (True/False)
Answer» SOLUTION :FALSE. Sertoli CELLS provide NUTRITION to germ cells.

Discussion

21937.	Question : Androgens are commonly called 3F hormones.
Answer» ANSWER :Adrenalins are COMMONLY CALLED 3F HORMONES.

Discussion

21938.	Question : Androgens are secreted by.
Answer» Testes Ovary Thyroid Adrenal Answer :A

Discussion

21939.	Question : Androgenic haploids are produced in anther cultures by
Answer» TAPETUM anther WALL connectives yong POLLEN GRAINS Answer :D

Discussion

21940.	Question : Androgenic haploid plants were produced by anther culture first time by
Answer» C. Auerbatch and L.J.Stadler Sipra GUHA and S.C. Maheswari W. Bateson C.A.Ninan Answer :B

Discussion

21941.	Question : Androecium is made up of ……………. .
Answer» Megasporphyll Pistil Sepals Stamens Answer :A

Discussion

21942.	Question : State the condition of androecium having free filaments and united anthers.
Answer» ANSWER :SYNGENESIOUS

Discussion

21943.	Question : ____and____chromosomes are normally called sex chromosomes.
Answer» ANSWER :X and Y

Discussion

21944.	Question : .............and...........are the two key concepts of Darwinian theory of evolution.
Answer» SOLUTION :BRANCHING DESCENT and NATURAL SELECTION

Discussion

21945.	Question : ___and____ are two surgical contraceptive methods in males and and females respectively.
Answer» SOLUTION :VASECTOMY and TUBECTOMY.

Discussion

21946.	Question : _________and ____________are involved in regulation of sexual behaviour,
Answer» CEREBRAL cortex and POSTERIOR pituitary Corpora quadrigemina and pons Hypothalamus and limbic system Hypothalamus and MEDULLA oblongta Answer :C

Discussion

21947.	Question : Ancient mammals enjoyed a release from competition when the dinosaurs became extinct. Should humans work to ensure that such releases from competition continue to occur for us or for other species?
Answer» No, because it is impossible to predict which pecies will become DOMINANT if other species become extinct will cause the extinction of humans. No, because the species that become dominant will cause the extinction of humans. YES, because the organisms that are released from competition will ALWAYS form more new species then the NUMBER that went extinct Yes, because new species that evolve are always better organisms than those that went extinct Answer :A

Discussion

21948.	Question : Ancient mammals enjoyed release from competition when the dinosaurs become extinct. Should humans work to ensure that such religious from competition continue to occurs for us other species?
Answer» No, because it is impossible to PREDICT which species will become dominant if other species become extinct No, because the species that become dominant will cause the EXTINCTION of humans Yes, because the organism that are released from competition will always from more new species than the NUMBER that went extinct Yes, because new species that INVOLVES the always better organism than those that were extinct Answer :A

Discussion

21949.	Question : Which of the following stood erect first?
Answer» AUSTRALOPITHECUS CROMAGNON Java-ape MAN PEKING man Solution :Australopithecus

Discussion

21950.	Question : Ancestors of mammals
Answer» Ornithrischia Theraspidia Silusidea Chelonia Answer :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : Animals have the innate ability to escape from Predatlon. Examples for the same are given below. Select the Incorrect example.

Question : Animals having both male and female reproductive organ are called what ?

Question : Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example,

Question : Animals giving birth to young ones are

Question : Animals giving birth to young ones are:

Question : Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect examples:

Question : Animals giving birth to young ones are ...................

Question : Animal used by Dr. Lalji Singh to develop DNA finger printing technique.

Question : Animal species should be protected because they are

Question : Animals of which habitat are mostly uricoltelic?

Question : Which habitat's animals are mostly ammonotelic ?

Question : Animal husbandry is

Question : Animal husbandry deals with

Question : Animal husbandry and plallL LJreedillg programmes are the examples of

Question : Animal husbandry and plant breeding programmers are the examples of

Question : Angstrom (Å) is equal to

Question : angona wool is obtained from

Question : Animal and plants are best protected in :

Question : Angiotensin-II stimulates pancreas.

Question : Angiotensin-ll is responsible for all of the following except

Question :Angiotensin II is

Question : Angiosperms produce male and female reproductive structures in which male and female gametophytes and gametes are produced . (a) Name the male andfemale reproductive structure . (b) Name the male and female gametophytes .

Question : Angina pectoris is

Question : ANF, Is secrets by

Question : ANF' is a hormone ,Which

Question : Angina pectoris.

Question : ANF' is

Question : Aneuploidy is :

Question : Anemophily is pollination affected by :

Question : Anemophilous flowers produce abundant pollen grains . Give reason.

Question : Anemophily means :

Question : Anemophilous flowers are colourless and non - scented . What may be the reason ?

Question : Androgens are produced by Sertoli cells. [True / False ]

Question : Anemophilous flowers have :

Question : Anemophilous flowers

Question : Androgens are produced by Sertoli cells. (True/False)

Question : Androgens are commonly called 3F hormones.

Question : Androgens are secreted by.

Question : Androgenic haploids are produced in anther cultures by

Question : Androgenic haploid plants were produced by anther culture first time by

Question : Androecium is made up of ……………. .

Question : State the condition of androecium having free filaments and united anthers.

Question : ____and____chromosomes are normally called sex chromosomes.

Question : .............and...........are the two key concepts of Darwinian theory of evolution.

Question : ___and____ are two surgical contraceptive methods in males and and females respectively.

Question : _________and ____________are involved in regulation of sexual behaviour,

Question : Ancient mammals enjoyed a release from competition when the dinosaurs became extinct. Should humans work to ensure that such releases from competition continue to occur for us or for other species?

Question : Ancient mammals enjoyed release from competition when the dinosaurs become extinct. Should humans work to ensure that such religious from competition continue to occurs for us other species?

Question : Which of the following stood erect first?

Question : Ancestors of mammals

Question : andchromosomes are normally called sex chromosomes.

Question : _and__ are two surgical contraceptive methods in males and and females respectively.

Question : _and ____are involved in regulation of sexual behaviour,