24277 + Interview Questions in Biology in Class 12 Page 477 InterviewSolution

23801.	Question : A country with a high rate of population growth took measures to reduce it. The figure below shows age- sex pyramid of populations A and B twenty years apart. Select the correct interpretation about them.
Answer» "A" is the EARLIER pyramid and no change has occurred in the growth RATE "A" is more RECENT and SHOWS slight REDUCTION in the growth rate. "B" is the earlier pyramid and shows stabilised growth rate. "B" is more recent showing that population is very young. Answer :B

Discussion

23802.	Question : A country with a high rate of population growth took measures to reduce it. The figure below shows are sex pyramids of populations. A and B twenty years apart. Select the correct interpretation about them. Interpretations
Answer» A' is more recent and shows slight REDUCTION in the GROWTH rate 'B' is EARLIER pyramid and shows stabilised growth rate B' is more recent SHOWING that population is very young 'A' is the earlier pyramid and no change has OCCURRED in the growth rate Answer :A

Discussion

23803.	Question : A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations "A" and "B" twenty years apart. Select the correct interpretation about them Interpretations:
Answer» "A" is more recent and shows slight reduction in the GROWTH RATE "A" is the earlier PYRAMID and no change has occurred in the growth rate "B" is earlier pyramid and shows stabilised growth rate "B" is more recent showing that POPULATION is very young Answer :A

Discussion

23804.	Question : A country with a high rate of population growth took measures to reduce it. The figure below shows age sex pyramids of populations. A and B twenty years apart. Select the correct interpretation about them
Answer» A' is more recent and shows slight REDUCTION in the growth rate B' is earlierpyramid and shows stabilised growth rate B' is more recent SHOWING that population is very young A' is the EARLIER pyramid and no change has occurred in the growth rate Solution :Interpretation 'a' is CORRECT for the given FIGURES. As 'A' is more recent and shows slight reduction in the growth rate.

Discussion

23805.	Question : (A]: Cotton is a filling fibre only.[R]: Cotton is a bast fibre
Answer» If both A and R are true and R is the CORRECT explanation of A If both A and R are true but R is not the correct explanation of A If A is true and R is false If both A and R are false ANSWER :D

Discussion

23806.	Question : [A]: Convergent evolution leads to pro_duct1on of analogous similarities among different groups of organisms.[R]: Animals of the same grou~ or closely r~- lated groups exhibit great divergences in their morphology
Answer» If both A and R are true and R is the correct EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is FALSE If both A and R are false ANSWER :B

Discussion

23807.	Question : [A]: Copy choice theory for crossing over was propos'ed by Belling. [R]: Accprding to this theory, pairedchromo- somes in Meiosis I, duplicate their genes before the development of fibres that join them in tandem.
Answer» If both A and R are true and R is the correct EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is FALSE If both A and R are false ANSWER :B

Discussion

23808.	Question : A contraceptive pill prevents ovulation by
Answer» BLOCKING FALLOPIAN TUBE inhibiting release of FSH and LH stimulating release of FSH and LH causing immediate DEGENERATION of released ovum. Solution :inhibiting release of FSH and LH

Discussion

23809.	Question : A contraceptivepill contains
Answer» Progesterone and ESTROGEN Spermicidalsalts chemicals that CAUSE automatic abortion Chemicals thatprebent fertillzation of ovum . Answer :C

Discussion

23810.	Question :A contraceptiveis
Answer» condom CERVICAL CAP or diaphragm intrauterinedevice PILL all theabove ANSWER :a

Discussion

23811.	Question : Cells are connected by plasmodesmata, the system is called:
Answer» ANSWER :SYMPLAST

Discussion

23812.	Question : A considerable amount of carbon returns to the atmosphere through the respiratory activities of
Answer» PRODUCERS CONSUMERS (A) and (B) Both None Solution :(A) and (B) Both

Discussion

23813.	Question : [A] : Conjunctiva is composed of squamous epithelium and lines the eye lids. Conjuctive is thick , little cornifid and richly supplied with free nerve endings
Answer» If both A and R are TRUE and R is the CORRECT EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is false If both A and R are false Answer :D

Discussion

23814.	Question : A connection between foetal membrane and uterine wall is known as placenta. a. Mention the functions of placenta. b. What is the fate of placenta after parturition? c. Sometimes the expulsion of placenta is followed by bleeding. Give reason.
Answer» Solution :a.Functions of placenta i. It acts as a barrier between the FOETUS and the mother. ii. It acts as an ultrafilter. iii. Soluble inorganic and organic materials, nutrients, HORMONES, antibodies against diphtheria, small pox, scarlet fever, measles etc. can PASS through the placenta from mother to foetus. iv.It helps in the exchange of gases between the mother and the foetus. v. It helps in the elimination of nitrogenous discharges and other wastes of the foetus. vi.It acts as an endocrine gland and produces hormones such as HCG, CHORIONIC thyrotropin, chorionic CORTICOTROPIN, chorionic somatomammotropin, estrogens and progesterone. It also secretes progesterone until the end of pregnancy. At the time of parturition, the placenta secretes relaxin, which helps in the relaxation of pubic ligaments to enable birth of the child. b.Shortly after the baby is born, the placenta and the remains of the umbilical cord, known as the afterbirth is expelled out. c.Because the vascular tissues are damaged in the process of parturition.

Discussion

23815.	Question : [A]: Conjunctiva is composed of squamous epithelium and is continuous with the dermis that lines the eyelids.[R]: The conjunctjva is thick highly cornified and richly supplied with free nerve endings.
Answer» If both A and R are TRUE and R is the CORRECT explanation of A If both A and R are true but R is not the correct explanation of A If A is true and R is false If both A and R are false ANSWER :D

Discussion

23816.	Question : State the condition where male and female flowers are borne on the same plant.
Answer» ANSWER :MONOECIOUS

Discussion

23817.	Question : A condition of xylem where protoxylem lies towards the centre.
Answer» ANSWER :ENDARCH

Discussion

23818.	Question : A condition in which there may be plenty of water in soil but a plant is unable to absorb it is ______.
Answer» ANSWER :PHYSIOLOGICAL DRYNESS

Discussion

23819.	Question : A concentric vascular bundle where phloem surrounds the xylem is called _____
Answer» ANSWER :Amphlcribal

Discussion

23820.	Question : A compound formed by the linking of a molecule of nitrogenous base with a pentase sugar with the help of glycosidic bond.
Answer» ANSWER :NUCLEOSIDE

Discussion

23821.	Question : A compound formed by one molecule each of pentose sugar,phosphate and nitrogenous base.
Answer» ANSWER :NUCLEOTIDE

Discussion

23822.	Question : A component of female reproductive system in angiosperms is
Answer» STAMEN Anther Microspore Embrayo sac Answer :D

Discussion

23823.	Question : A component of female reproductive system is :
Answer» Stamen Anther Microspore Embryo sac Answer :D

Discussion

23824.	Question : A: Complete radicle is not produced by hypobasal tier of octant embryo during cruciferad development R" Hypophysis cell of suspensor contributes the tip of raadicle in this type of development
Answer» if both assetion A reason are ture and the reason is the correct explanation of the assertion then MARK if both assertion & reason are ture and the reason is not the correct explanation of the assertin then mark if assertion is TRUE STATEMENT but reason is false then mark if both assertion and reason are flase statements then mark Answer :A

Discussion

23825.	Question : A competitive inhibitor of succinic dehydrogenase is:
Answer» ALPHA ketoglutarate Malate Malonate Oxaloacetate Answer :C

Discussion

23826.	Question : A competitive inhibitor of an enzyme :-
Answer» Increases `K_(m)` without AFFECTING `V_(MAX)` Decreases `K_(m)` without affecting `V_(max)` Decreases `K_(m)` without affecting `V_(max)` Decreases both `V_(max)` and `K_(m)` Answer :A

Discussion

23827.	Question : A common test to find the genotype of a hybrid is by:
Answer» Crossing of ONE `F_2` progeny with female parent Studying the sexual BEHAVIOUR of `F_1` progenies Crossing of one `F_1` progeny with male parent Crossimg of one `F_2`progeny with male parent Answer :C

Discussion

23828.	Question : A common test to find the genotype of a hybrid is by
Answer» Crossing of ONE `F_(2)` PROGENY with male parent crosing of one `F_(2)` progeny with female parent Studying the SEXUAL behaviour of `F_(1)` progenies crossing of one `F_(1)` progeny with male parent Answer :D

Discussion

23829.	Question : A common duct that opens into duodenum and is guarded by spincter of Oddi is formed by joining of
Answer» CYSTIC DUCT+PANCREATIC duct Main pancreatic duct+common BILE duct Cystic duct+common bile duct Common bile duct+ duct of santorini Answer :B

Discussion

23830.	Question : A common scent-producing gland among mammals is
Answer» ANAL gland Prostate gland Adernal gland Bartholin's gland Answer :A

Discussion

23831.	Question : A common cause of deforestation is slash and burn agriculture. What is the common name attributed to such type of cultivation ?
Answer» SOLUTION :JHUM CULTIVATION

Discussion

23832.	Question : A common cause of deforestation is slash and burn agriculture. Explain how this type of cultivation is practised?
Answer» SOLUTION :Farmers cut down the trees of the forest and burn the plant remains. The ash is USED as a fertilizer and the land is used for FARMING or CATTLE GRAZING.

Discussion

23833.	Question :A common biocontrol agent for the control of plant diseases is
Answer» BACULOVIRUS BACILLUS thuringiensis GLOMUS Trichoderma Answer :D

Discussion

23834.	Question : A column of water within xylem vessels of tall trees does not break under its weight because of
Answer» POSITIVE root pressure Dissolved SUGARS in water Tensile strength of water Lignification of XYLEM vessels Answer :C

Discussion

23835.	Question : A colourblind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind ?
Answer» `0.5` 1 Nil `0.25` SOLUTION :`0.25`

Discussion

23836.	Question : A colour blind man marry with a daughter of colour blind father , the generation will be
Answer» there will be no DAUGHTER COLOUR BLIND all SONS will colour blind all daughter will be colour blind half sons will be colour blind Answer :D

Discussion

23837.	Question : A colourblind child have both normal parents, the child is
Answer» MALE Female May be male or female Cannot be predicted Answer :A

Discussion

23838.	Question : A colour blind boy is born to a couple with a normal colour vision. Write the genotype of the parents.
Answer» SOLUTION :`{:("Father","Mother",N = "Normal vision"),(X^(N) Y^(N), ""X^(C) X^(+),C = "CARRIER"),(,, += "DOMINANT"):} `

Discussion

23839.	Question : A colour blind man marries a woam with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind?
Answer» 0.25 0.5 1 nil Answer :A

Discussion

23840.	Question : A colorblind man marries a women with normal sight who has no history of color blindness in her family. What is the probability of their grandson being colorblind?
Answer» `1//4` `3//4` `2//4` `4//4` ANSWER :a

Discussion

23841.	Question : A colony of bacteria growing on a given medium utilise a feed component affect the population and can survive under the new condition. This is come under the theory of
Answer» Lamark Darwin Louis Pasteur Malthus Answer :B

Discussion

23842.	Question : A collection of plants and seeds having diverse alleles of all genes of crop is calledA) Gene libraryB) GenomeC) HerbariumD) Germ plasm
Answer» GENE library Genome Germ plasm Herbarium Answer :C

Discussion

23843.	Question : A collection of plants and seeds having diverse alleles of all the genes of a crop is called
Answer» Herbarium Germplasmo Gene library Genome Answer :B

Discussion

23844.	Question : A collection of all the alleles of all the genes of a crop plant is called
Answer» Germplasm COLLECTION PROTOPLASM collection Herbarium Somaclonal collection Solution :A collection of all the alleles of all the GENES of a crop plant is called germplasm collection.

Discussion

23845.	Question : A codon consists of 3 bases and there are of 4 different kinds of bases in a nucleic acid altogether.how many codons will be there?
Answer» 64 86 22 60 Answer :A

Discussion

23846.	Question : (a) CO_2 O_2 , CH_4, N_2O, CFCs
Answer» SOLUTION :`O_2` all OTHERS are GREENHOUSE GASES.

Discussion

23847.	Question : A coacervate is a
Answer» Nucleoprotain in NATURE Mixture of AMMONIA and WATER COLLOIDAL suspension in water Mixture of contemporary bioprateins Answer :D

Discussion

23848.	Question : A clone of sheep Dolly has been made by :
Answer» GENE transfer Somatic CELL cloning Nucleus transfer Germinal cell cloning Answer :C

Discussion

23849.	Question : A 'clone' is a group of individual obtained through:
Answer» Self-pollination Hybridization Vegetative propagation Cross pollination Solution :N//A

Discussion

23850.	Question : [A]: Chromosomes are divided into hetero- chromatin and euchromatin part. [R]: Heterochromatin are those regions of chromosome that remain condensed during interphase and early prophase, and rest of the non-condensed form of chromosome is called euchromatin
Answer» If both A and R are TRUE and R is the CORRECT EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is FALSE If both A and R are false Answer :A

Discussion

Explore topic-wise InterviewSolutions in .

Question : A country with a high rate of population growth took measures to reduce it. The figure below shows age- sex pyramid of populations A and B twenty years apart. Select the correct interpretation about them.

Question : A country with a high rate of population growth took measures to reduce it. The figure below shows are sex pyramids of populations. A and B twenty years apart. Select the correct interpretation about them. Interpretations

Question : A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations "A" and "B" twenty years apart. Select the correct interpretation about them Interpretations:

Question : A country with a high rate of population growth took measures to reduce it. The figure below shows age sex pyramids of populations. A and B twenty years apart. Select the correct interpretation about them

Question : (A]: Cotton is a filling fibre only.[R]: Cotton is a bast fibre

Question : [A]: Convergent evolution leads to pro_duct1on of analogous similarities among different groups of organisms.[R]: Animals of the same grou~ or closely r~- lated groups exhibit great divergences in their morphology

Question : [A]: Copy choice theory for crossing over was propos'ed by Belling. [R]: Accprding to this theory, pairedchromo- somes in Meiosis I, duplicate their genes before the development of fibres that join them in tandem.

Question : A contraceptive pill prevents ovulation by

Question : A contraceptivepill contains

Question :A contraceptiveis

Question : Cells are connected by plasmodesmata, the system is called:

Question : A considerable amount of carbon returns to the atmosphere through the respiratory activities of

Question : [A] : Conjunctiva is composed of squamous epithelium and lines the eye lids. Conjuctive is thick , little cornifid and richly supplied with free nerve endings

Question : A connection between foetal membrane and uterine wall is known as placenta. a. Mention the functions of placenta. b. What is the fate of placenta after parturition? c. Sometimes the expulsion of placenta is followed by bleeding. Give reason.

Question : [A]: Conjunctiva is composed of squamous epithelium and is continuous with the dermis that lines the eyelids.[R]: The conjunctjva is thick highly cornified and richly supplied with free nerve endings.

Question : State the condition where male and female flowers are borne on the same plant.

Question : A condition of xylem where protoxylem lies towards the centre.

Question : A condition in which there may be plenty of water in soil but a plant is unable to absorb it is ______.

Question : A concentric vascular bundle where phloem surrounds the xylem is called _____

Question : A compound formed by the linking of a molecule of nitrogenous base with a pentase sugar with the help of glycosidic bond.

Question : A compound formed by one molecule each of pentose sugar,phosphate and nitrogenous base.

Question : A component of female reproductive system in angiosperms is

Question : A component of female reproductive system is :

Question : A: Complete radicle is not produced by hypobasal tier of octant embryo during cruciferad development R" Hypophysis cell of suspensor contributes the tip of raadicle in this type of development

Question : A competitive inhibitor of succinic dehydrogenase is:

Question : A competitive inhibitor of an enzyme :-

Question : A common test to find the genotype of a hybrid is by:

Question : A common test to find the genotype of a hybrid is by

Question : A common duct that opens into duodenum and is guarded by spincter of Oddi is formed by joining of

Question : A common scent-producing gland among mammals is

Question : A common cause of deforestation is slash and burn agriculture. What is the common name attributed to such type of cultivation ?

Question : A common cause of deforestation is slash and burn agriculture. Explain how this type of cultivation is practised?

Question :A common biocontrol agent for the control of plant diseases is

Question : A column of water within xylem vessels of tall trees does not break under its weight because of

Question : A colourblind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind ?

Question : A colour blind man marry with a daughter of colour blind father , the generation will be

Question : A colourblind child have both normal parents, the child is

Question : A colour blind boy is born to a couple with a normal colour vision. Write the genotype of the parents.

Question : A colour blind man marries a woam with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind?

Question : A colorblind man marries a women with normal sight who has no history of color blindness in her family. What is the probability of their grandson being colorblind?

Question : A colony of bacteria growing on a given medium utilise a feed component affect the population and can survive under the new condition. This is come under the theory of

Question : A collection of plants and seeds having diverse alleles of all genes of crop is calledA) Gene libraryB) GenomeC) HerbariumD) Germ plasm

Question : A collection of plants and seeds having diverse alleles of all the genes of a crop is called

Question : A collection of all the alleles of all the genes of a crop plant is called

Question : A codon consists of 3 bases and there are of 4 different kinds of bases in a nucleic acid altogether.how many codons will be there?

Question : (a) CO_2 O_2 , CH_4, N_2O, CFCs

Question : A coacervate is a

Question : A clone of sheep Dolly has been made by :

Question : A 'clone' is a group of individual obtained through:

Question : [A]: Chromosomes are divided into hetero- chromatin and euchromatin part. [R]: Heterochromatin are those regions of chromosome that remain condensed during interphase and early prophase, and rest of the non-condensed form of chromosome is called euchromatin