24277 + Interview Questions in Biology in Class 12 Page 119 InterviewSolution

5901.	Question : The head and tail of chlorophyll are made up of
Answer» PORPHYRIN and phytin PYRROL and tetrapyrrol Porphyrin and PHYTOL Tetrapyrrol and pyrrol Answer :C

Discussion

5902.	Question : The harmful allele of sickle cell anemia has not been eliminated from human population. Such afflicted people derive some other benefit. Discuss.
Answer» Solution :The harmful alleles GET eliminated from population over a period of time, yet sickle cell anaemia is persisting in human population. because SCA is a harmful condition `(Hb^s Hb^s)` butis also a potential saviour from malaria. Those with the benign sickle trait possess a resistance to malarial infection. The pathogen that causes the disease SPENDS part of its cycle in the red blood cells and triggers an abnormal drop in oxygen levels in the cell. In carriers `(Hb^A Hb^s)`this drop is sufficient to trigger the full sickle-cell reaction. which leads to infected cells being rapidly removed from circulation and strongly LIMITING the infection.s progress. These individuals have a great resistance to infection and have a greater chance of surviving outbreaks. This resistance to infection is the main REASON the SCA allele and SCA disease still exist. It is found in greatest frequency in populations where malaria was and is still often a serious PROBLEM. Normal persons `(Hb^A Hb^A)` are sensitive to plasmodium.

Discussion

5903.	Question : The hard outer layer of pollen is composed ofExineIntineIntegumentSporopollenin
Answer» EXINE INTINE Integument Sporopollenin Answer :D

Discussion

5904.	Question : The haploid content of human DNA is
Answer» `3.3 XX 10^(6) BP` `3.3 xx 10^(9) bp` `4.6 xx 10^(6) bp` `6.6 xx 10^(9) bp` Answer :B

Discussion

5905.	Question : The length of the haploid content of human DNA is
Answer» `3.3 XX 10^9 BP` `3.3 xx 10^9 KBP` `4.6 xx 10^6 bp` `48502 bp ` ANSWER :A

Discussion

5906.	Question : the haploidchromosome number in allium cepa is as many times greater in the following as that of haplopous gracilis :
Answer» 4 fold 2 fold 6 flod 3 flod Answer :A

Discussion

5907.	Question : The haemoglobin content per 100 ml of blood of a normal healthy human adult is
Answer» 5-11 mg 25- 30 mg 17- 20 mg 12-16 mg Answer :D

Discussion

5908.	Question : The Haffkine Institute, Mumbai , is known for its work on the production of
Answer» PLAGUE vaccine leprosy vaccine tetanus vaccine POLIO vaccine Solution :The Haffkine Institute of MUMBAI is known for its WORK on the production of polio vaccine.

Discussion

5909.	Question : The gynoecium consists of many free pistils in flowers of:
Answer» 'Tomato Papaver Michelila Aloe Answer :C

Discussion

5910.	Question : The growth regulator associated with drought stress tolerance is:
Answer» Auxin Kinetin Gibberellic acid ABA Answer :D

Discussion

5911.	Question : The growth of a population without limit at its maximal rate and also that, rates of immigration and emigration are equal, then it is called
Answer» Carrying CAPACITY BIOTIC potential POSITIVE growth Negative growth Answer :B

Discussion

5912.	Question : The growth of corpus luteum is initiated by
Answer» human chorionic gonadotropin follicle stimulating HORMONE LUTEINIZING hormone PROLACTIN ANSWER :C

Discussion

5913.	Question : The ground tissue system consists of -
Answer» Parenchyma Collenchyma Sclerenchyma All of the above Answer :D

Discussion

5914.	Question : The ground tissue system consists ofsimple tissue such as :
Answer» PARENCHYMA and Collenchyma Collenchyma and Sclerenchyma Parenchyma and Sclerenchyma All of these Answer :D

Discussion

5915.	Question : The ground substance of chloroplast.
Answer» ANSWER :STROMA

Discussion

5916.	Question : The green revolution succeeded in tripling the food supply but yet it was not enough to feed the growing human population increased yield have mainly been due to the use of (a) Improvedcrop variety (b) Bettermanagement practices (c) Agrochemicals(fertilizersand pesticides)(A) a and b(B) b and c(C) a and c(D) a, b and c
Answer» a and B b and C a and c a, b and c SOLUTION :b and c

Discussion

5917.	Question : The green scum seen in the fresh water bodies is :(A) blue-green algae(B) red algae(C) green algae(D) both(A) and (C)
Answer» blue-green algae red algae green algae both(B) and (C ) Solution :The green SCUM SEEN in the fresh water bodies is DUE to blue green algae and green algae. While red algae is a marine algae.

Discussion

5918.	Question : The greatest problem for the primitive vertebrates reching freshwater was
Answer» absorption of too much water through thrie skin LOSS of water through their skin AVAILABILITY of less food ENCOUNTERING new predators ANSWER :A

Discussion

5919.	Question : The greatest quantity of the air that can be expired,after a maximum inspiratory effort is its:
Answer» RESIDUAL VOLUME, TIDAL volume Vital capacity Lung, volume Answer :C

Discussion

5920.	Question : The greatest biomass of autotrophs in the world's oceans is that of:
Answer» free-floating micro-ALGAE, cyanobacteria and nanoplankton BENTHIC BROWN algae, coastal RED algae and daphnids benthic diatoms and marine viruses SEA grasses and slime moulds Answer :A

Discussion

5921.	Question : The greatest contribution of root pressure is
Answer» Water MOVEMENT up in a tall tree Translocation of minerals from SENESCENT part to young parts of plants Re-establish the broken water chain in water COLUMN of xylem which CREATED by transpiration Guttation in tall and woody plants Answer :C

Discussion

5922.	Question : The greater the concentration of water in a system the greater is it's kinetic energy or water potential which of following is correct about water potential?
Answer» Water POTENTIAL of pure water is 0 and it is its minimum value. Water potential of SOLUTION is always positive If PRESSSURE greater than atmospheric pressure is applied to pure water or solution then its water potential increases All the above Answer :C

Discussion

5923.	Question : The greatest biodiversity in world is reported in
Answer» AMAZONIAN FOREST coniferous forest W ghats Scandinavian forest Answer :A

Discussion

5924.	Question : The greatest biodiversity on Earth is found in:
Answer» Tropical AMAZONIAN rain FORESTS in SOUTH America Temperate Amazonian rain forests in NORTH America Tropical Amazonian rain forests in South Africa Temperate Amazonian rain forests in South America Answer :A

Discussion

5925.	Question : The greater the BOD of waste water........(A) less the pollutants(B) more the pollutant(C) more CO_2 (D) less CO_2
Answer» LESS the pollutants more the POLLUTANT more `CO_2` less `CO_2` SOLUTION :more the pollutant

Discussion

5926.	Question : The great barrier reef along the east coast of Australia can be categorized as
Answer» Population COMMUNITY ECOSYSTEM BIOME SOLUTION :Community

Discussion

5927.	Question : The Great Barrier Read along the east coast of Australia can be categorized as
Answer» Population B competed more successfully for FOOD than population A Community Ecosystem Biome Answer :C

Discussion

5928.	Question : The Great BarrierReef along the east coast of Australia can be categorized as :
Answer» Population Community Ecosystem Biome Answer :D

Discussion

5929.	Question : The grass family cotyledon is called what?
Answer» ANSWER :SCUTELLUM

Discussion

5930.	Question : The grasslands in Asia are known as
Answer» STEPPES VELDT PAMPAS PRAIRIES ANSWER :A

Discussion

5931.	Question : The graphical representation to calculate the probability of all possible genotypes of offspring in a genetic cross is calleda) Pedigree analysisb) Karyotypec) Punnett squared) Chromosome map
Answer» Pedigree analysis Karyotype PUNNETT square Chromosome map Answer :C

Discussion

5932.	Question : The graph shows the effect of liver and kidneys in dogs on the amount of urea in the blood. On the graph, two marks O and X shows the time when these two organs were removed . Which mark shows the removal of which organ ?
Answer» O' stands for REMOVAL of LIVER and 'X' for the removal of KIDNEY O' stands for the removal of kidney and 'X'for the removal of liver. The given data is incomplete. Any of the mark can be taken as the TIME of removal of kidney or the liver Answer :1

Discussion

5933.	Question :The graphical representation to calculate the probability of all possible genotypes of offspring in a genetic cross is called :
Answer» pedigree analysis karyotype PUNNETT SQUARE CHROMOSOME map Answer :C

Discussion

5934.	Question : The graphical representation to calculate the probability of all possible genotypes of offspring in a genetic cross is called
Answer» PEDIGREE analysis Karyotype Punnett square Chromosome map Answer :C

Discussion

5935.	Question : The graphical representation of the successive trophic level of an ecosystem _____
Answer» SOLUTION :ECOLOGICAL PYRAMIDS

Discussion

5936.	Question : The graph shown below indicates the per head consumption of energy. If it is going on in this manner, there will be an energy crisis in the nearby future. So suggest an alternate way to face this situation.
Answer» Solution :i. Limited use of FOSSIL fuels. ii. Use of smokeless and efficient WOOD stoves. iii. Exploitation of solar energy. iv. Use of BIOGAS plants. v. Generation of hydroelectricity from wind and tidal power. VI. GROWING fuel wood trees and shrubs.

Discussion

5937.	Question : The graph showing rate of Photosynthesis at different wavelengths of light is called
Answer» Absorption spectrum ACTION spectrum Both (1) and (2) NONE of these Answer :B

Discussion

5938.	Question : Explain the changes that can be observed in the characteristics of river water when sewage is discharged into it and a few weeks after the discharge with respect to : (i) level of dissolved oxygen(ii) population of fresh water organisms.
Answer» PEAK A- Sharp increase in BOD, disappearance of clean water organisms Peak B- Increase in dissolved oxygen, reappearance of clean water organisms Peak A- Increase in dissolved oxygen, reappearance of cleanwater organisms Peak B- Sharp increase in BOD, appearance of clean water organisms Peak A- Sharp increase in BOD, appearance of clean water organisms Peak B- INCREASED number in dissolved oxygen, disappearance of clean water organisms Peak A- Increased number of anaerobic BACTERIA, disappearance of clean water organisms Peak B- Sharp decline in dissolved `O_(2)`, reappearance of clean water organisms Solution :N//A

Discussion

5939.	Question : The graph given below represents changes in different ecological parameters due to effluent mixing in a stream. The three lines A, B anc C represent
Answer» A: oxygen concentration B: BIOLOGICAL `O_(2)` demand C: POLLUTION resistant species A: pollutan B: AEROBIC process C: anaerobic process A: oxygen concentration B: `CO_(2)` concentration C: termperature A: phosphate concentration B: nitrate concentration C: rate of photosynthesis. Solution :Effluent discharge mixing into a river will result in rise of BOD because decomposer organisms consume a lot of oxygen. If sewage quantity is large, the whole of dissolved oxygen may be consumed leaving nothe for respiration of fish and other clean water organisms. They, therfore, get killed. However, as sewage is decomposed, there is a gradual rise in dissolved oxygen downstream. Fish and other clean water organisms reappear INDICATING the recovery of river from sewage pollution. Meanwhile, number of pollution resistant species increases in the stream.

Discussion

5940.	Question : The gradual change in the species composition of a given area leading to the formation of climax community is called ecological succession. In a rocky area, How this pioneer species leads to the establishment of a stabe climax community?
Answer» SOLUTION :lichens - mosses - herbs - shrubs - forest. These are DIFFERENT stages and LEADS to STABLE climax community.

Discussion

5941.	Question : The gradual and fairly predictale changes in the species composition in an area is called ecological succession. Name the pioneer species in the primary succession in water.
Answer» SOLUTION :PHYTOPLANKTON

Discussion

5942.	Question : The gradual and predictable change in the species composition of a given area is called ecological succession. What do you understand with the pioneer and climax community in this context?
Answer» Solution :• Pioneer Community (SPECIES) Community that invades a bare area. • CLIMAX community - Last sustainable community that is in NEAR EQUILIBRIUM with the ENVIRONMENT.

Discussion

5943.	Question : The gradual and fairly predictale changes in the species composition in an area is called ecological succession. Give the sequence of events and climax community in the hydrarch succession.
Answer» Solution :(1) PHYTOPLANKTON STAGE (2) Submerged stage (3) Submerged free floating stage (4) Reed SWAMP stage (5) March meadow stage (6) Scrub stage (7) FOREST stage

Discussion

5944.	Question : The good milk producer Indian buffaloes are ……….. .
Answer» NAGPURI, MURRAH and Surati Mehsana, Gir and Sindhi Jersey, Holstein and Nili Murrah, SAHIWAL and BROWN Swiss Answer :A

Discussion

5945.	Question : The gradual and fairly predictable changes in the species composition in an area is called ecological succession. Give the sequence of events and climax community in the hydrarch succession.
Answer» Solution :PHYTOPLANKTON `rarr submerged flee FLOATING `rarr` Reed SWAMP `rarr` marsh meadow `rarr` scrub `rarr` FOREST

Discussion

5946.	Question : The gradual and fairly predictable changes in the species composition in an area is called ecological succession. Name the pioneer species in the primary succession in water.
Answer» SOLUTION :PHYTOPLANKTON

Discussion

5947.	Question : The gobar gas is a mixture of all of the given gases,except
Answer» `CH_4` `NO_2` `CO_2` `H_2S` ANSWER :B

Discussion

5948.	Question : The golden age of reptiles was
Answer» MESOZOIC era Cenozoic era PALEOZOIC era PROTEROZOIC era SOLUTION : Mesozoic era

Discussion

5949.	Question : The glomerular filtrate contains -
Answer» Urea, Uric acid and proteins Urea, RBC, and CLOTTING factors Urea, Uric acid, WATER and albumin Urea, Uric acid, GLUCOSE and water Answer :D

Discussion

5950.	Question : The glomerular capillary blood pressure causes filtration of blood through
Answer» 2 layers 1 layer 3 layers 5 layers ANSWER :C

Discussion

Explore topic-wise InterviewSolutions in .

Question : The head and tail of chlorophyll are made up of

Question : The harmful allele of sickle cell anemia has not been eliminated from human population. Such afflicted people derive some other benefit. Discuss.

Question : The hard outer layer of pollen is composed ofExineIntineIntegumentSporopollenin

Question : The haploid content of human DNA is

Question : The length of the haploid content of human DNA is

Question : the haploidchromosome number in allium cepa is as many times greater in the following as that of haplopous gracilis :

Question : The haemoglobin content per 100 ml of blood of a normal healthy human adult is

Question : The Haffkine Institute, Mumbai , is known for its work on the production of

Question : The gynoecium consists of many free pistils in flowers of:

Question : The growth regulator associated with drought stress tolerance is:

Question : The growth of a population without limit at its maximal rate and also that, rates of immigration and emigration are equal, then it is called

Question : The growth of corpus luteum is initiated by

Question : The ground tissue system consists of -

Question : The ground tissue system consists ofsimple tissue such as :

Question : The ground substance of chloroplast.

Question : The green scum seen in the fresh water bodies is :(A) blue-green algae(B) red algae(C) green algae(D) both(A) and (C)

Question : The greatest problem for the primitive vertebrates reching freshwater was

Question : The greatest quantity of the air that can be expired,after a maximum inspiratory effort is its:

Question : The greatest biomass of autotrophs in the world's oceans is that of:

Question : The greatest contribution of root pressure is

Question : The greater the concentration of water in a system the greater is it's kinetic energy or water potential which of following is correct about water potential?

Question : The greatest biodiversity in world is reported in

Question : The greatest biodiversity on Earth is found in:

Question : The greater the BOD of waste water........(A) less the pollutants(B) more the pollutant(C) more CO_2 (D) less CO_2

Question : The great barrier reef along the east coast of Australia can be categorized as

Question : The Great Barrier Read along the east coast of Australia can be categorized as

Question : The Great BarrierReef along the east coast of Australia can be categorized as :

Question : The grass family cotyledon is called what?

Question : The grasslands in Asia are known as

Question : The graphical representation to calculate the probability of all possible genotypes of offspring in a genetic cross is calleda) Pedigree analysisb) Karyotypec) Punnett squared) Chromosome map

Question : The graph shows the effect of liver and kidneys in dogs on the amount of urea in the blood. On the graph, two marks O and X shows the time when these two organs were removed . Which mark shows the removal of which organ ?

Question :The graphical representation to calculate the probability of all possible genotypes of offspring in a genetic cross is called :

Question : The graphical representation to calculate the probability of all possible genotypes of offspring in a genetic cross is called

Question : The graphical representation of the successive trophic level of an ecosystem _____

Question : The graph shown below indicates the per head consumption of energy. If it is going on in this manner, there will be an energy crisis in the nearby future. So suggest an alternate way to face this situation.

Question : The graph showing rate of Photosynthesis at different wavelengths of light is called

Question : Explain the changes that can be observed in the characteristics of river water when sewage is discharged into it and a few weeks after the discharge with respect to : (i) level of dissolved oxygen(ii) population of fresh water organisms.

Question : The graph given below represents changes in different ecological parameters due to effluent mixing in a stream. The three lines A, B anc C represent

Question : The gradual change in the species composition of a given area leading to the formation of climax community is called ecological succession. In a rocky area, How this pioneer species leads to the establishment of a stabe climax community?

Question : The gradual and fairly predictale changes in the species composition in an area is called ecological succession. Name the pioneer species in the primary succession in water.

Question : The gradual and predictable change in the species composition of a given area is called ecological succession. What do you understand with the pioneer and climax community in this context?

Question : The gradual and fairly predictale changes in the species composition in an area is called ecological succession. Give the sequence of events and climax community in the hydrarch succession.

Question : The good milk producer Indian buffaloes are ……….. .

Question : The gradual and fairly predictable changes in the species composition in an area is called ecological succession. Give the sequence of events and climax community in the hydrarch succession.

Question : The gradual and fairly predictable changes in the species composition in an area is called ecological succession. Name the pioneer species in the primary succession in water.

Question : The gobar gas is a mixture of all of the given gases,except

Question : The golden age of reptiles was

Question : The glomerular filtrate contains -

Question : The glomerular capillary blood pressure causes filtration of blood through