24277 + Interview Questions in Biology in Class 12 Page 220 InterviewSolution

10951.	Question : Orchid flower, Ophrys co-evolves to maintain resemblance of its petal to female bee. Explain how and why does is do so ?
Answer» Solution :employs .sexual deceit. ONE petal bears uncanny RESEMBLANCE to FEMALE of the bee. MALE bee is attracted to what it preceives as a female . pseudo-copulates,. during which po,,en DUSTED on male bee.s body male be transfers pollen to another flower when the same been pseducopulates with another flower. Ophry does so because pollinaton success will be reduced unless itsco-evolves with female bee.

Discussion

10952.	Question :Oral contraceptive pills are used by female to check
Answer» Implantation Fertilization Ovulation Entry of SPERMS in vagina Answer :C

Discussion

10953.	Question : Oral contraceptive is composed of
Answer» Estorgen and growth HORMONE ESTROGEN and progestrones Estrogen and TESTOSTERONE progesterone and testosterone Solution :Oral contraceptiv eis composed of estrogen and progesterons.

Discussion

10954.	Question : Oral contraceptive pills are composed of :
Answer» ESTROGEN and PROGESTERONE Estrogen and TESTOSTERONE Progesterone and testosterone Estrogen and G.H. Answer :A

Discussion

10955.	Question : Oral contraceptive are prescribed in females to check :
Answer» OVULATION Fertilization Implantation ENTRY of SPERMS into vagina. Answer :A

Discussion

10956.	Question : Ora serrata is
Answer» Part of retina PRESENT in utriculus of EAR Gland present in ORAL CAVITY of Frog Oral cavity of PROTOCHORDATES Answer :A

Discussion

10957.	Question : Opium is obtained from :
Answer» CEDRUS deodara PAPAVER somniferum CINCHONA Colchicum Answer :B

Discussion

10958.	Question : Optimal temperature for spermatogenesis :-
Answer» Normal body TEMPERATURE (`37^(@)`C) `43^(@)-45^(@)` C `39^(@)-40^(@)C` `34.5-35^(@)C` Answer :D

Discussion

10959.	Question : Opium is not much clinically used because :-
Answer» LESS POTENT drug Shows PHYSICAL dependency Toxicity present in our body Prolonged used as medicine Answer :B

Discussion

10960.	Question : Optic lobes are the centres for_____.
Answer» VISUAL reflex Auditory reflex Both (A) and (B) TACTILE reflex Answer :C

Discussion

10961.	Question : Optic chiasma is formed by crossing_____nerves.
Answer» ANSWER :OPTIC

Discussion

10962.	Question : Opioids is obtained from .
Answer» flower unriped FRUIT RIPED fruit LEAVES SOLUTION :unriped fruit

Discussion

10963.	Question : Ophrys is a Mediterranean orchid it's petals shows resemblance to female be in color size and markings but amle bee come into the flower and pollinateWhich is interaction used to explain pollination method mentioned above.
Answer» SOLUTION :MUTUALISM

Discussion

10964.	Question : Ophrys is a Mediterranean orchid it's petals shows resemblance to female be in color size and markings but amle bee come into the flower and pollinateName the sexual decite between male bees and orchid
Answer» SOLUTION :PSEUDOCOPULATION

Discussion

10965.	Question : Opiate narcotic is :
Answer» Bhang Charas Heroin Nicotine Answer :C

Discussion

10966.	Question : Ophrys an orchid resembling the female of an insect so as to able to get pollinated is due to phenomenon of
Answer» Mymecophily Ecological equivalents MIMICRY None of these Solution :Mimicry

Discussion

10967.	Question : Opening of stomata is due to
Answer» TURGIDITY of guard CELLS Size of guard cells Number of guard cells Amount of ` CO_2` in the ATMOSPHERE ANSWER :A

Discussion

10968.	Question : Fill in the blanks: Operon concept was given by __________.
Answer» JACOB and monad David Baltimore Alec Jeffery None of these Answer :A

Discussion

10969.	Question : Opening of a flower and drooping of a bud are examples of:
Answer» Nyctinasty Hyponasty Seismonasty Epinasty Answer :D

Discussion

10970.	Question : Open type of circulatory system is the system in which blood is pumped out of the heart and the cells and tissues are directly bathed in it. This type of circulatory system is found in :-
Answer» ARTHROPODA, MOLLUSCA Annelida, arthropoda, mollusca Arthropoda, mollusca, CEPHALOPOD mollusca Annelida, mollusca, cephalopod mollusca Answer :A

Discussion

10971.	Question : Opening and closing of stomata is due to
Answer» `C_(a)^+` `N_(a)^+` `K_+` `CL^_` ANSWER :C

Discussion

10972.	Question : Open Book Assessment 'Healthy reproduction, legally checked birth control measures and proper family planning programmes are essential for the survival of mankind' Justify.
Answer» Solution : Reproductive health and proper FAMILY planning programmes are HIGHLY essential for survival of mankind. Reproductive health refers to the state of PHYSICAL, psycological and social well being merely in absence of illness in all matter related to reproductive system and its proper functioning. Family planning has the following health and social benefits. Protecting the health of women by reducing frequent pregnancies. Reducing abortions. Providing stable population GROWTH. Assuming the INFANTS well being by providing adequate time lapse between successive pregnancies.

Discussion

10973.	Question : Oparin and Haldane's theory of chemical evolution of life was experimentally supported by
Answer» LANDSTEINER and Weiner Hardy and WEINBERG Oparin and Sydney Fox Miller and UREY ANSWER :D

Discussion

10974.	Question : Opaque white appearance of white matter is due to :-
Answer» FIBERS of tract covered by AXOLEMMA only Fibers of tract not covered by myelin sheath Fibers of tract covered by myelin sheath White MATTER absent in CNS Answer :C

Discussion

10975.	Question : Opacity of eye lens leads to
Answer» GLAUCOMA Cataract Presbyopia Atigamatism. ANSWER :B

Discussion

10976.	Question : Oparin and Haldane
Answer» SOLUTION :Theory of chemical evolution was given them. According them U1e first form of life came from PRE existing non- living ORGANIC molecule and chemical evolution was FOLLOWED by formation of life.

Discussion

10977.	Question : OP of the cell can be measured by:
Answer» Monometric method Photometric method Plasmolytic method Colorimetric method Answer :C

Discussion

10978.	Question : Oogenesis takes place in corpus luteum. (True/False)
Answer» SOLUTION :OOGENESIS TAKES PLACE in the OVARY.

Discussion

10979.	Question : Oogenesis takes placein corpus luteum. (True/False)
Answer» Solution :FALSE - OOGENESIS takes place in OVARY.

Discussion

10980.	Question : Oocyte is liberated from overy under the influence of LH,after compieting :
Answer» MEIOSIS and before LIBERATING POLAR bodies Meiosis -IAND before lierating polar bodies Meiosis Meiosis -I after RELEASE of polar body Answer :D

Discussion

10981.	Question : Oogamous reproduction in algae involves
Answer» Male gamet- MOTILE, FEMALE gamate - non-motile male gamate -non-motile, female gamate motile male gamate- non-motile, female gamate non-motile Both(1) and (3) ANSWER :D

Discussion

10982.	Question : Ontogeny recapitulates phylogeny, this theory is called
Answer» BIOGENETIC LAW Law of embryology Law of ACQUIRED characters Law of bridges Solution :Biogenetic law

Discussion

10983.	Question : Ontogeny Recapitulates Phylogeny' is narrated in which of the evidences for organic evolution?
Answer» Palaeontological EVIDENCE Physiological evidence EMBRYOLOGICAL evidence Anatomical evidence SOLUTION :Embryological evidence

Discussion

10984.	Question : Onset of menstruation of human female is called
Answer» menopause puberty gestation menarche Answer :D

Discussion

10985.	Question : Ontogeny recapitulates phylogeny. Discuss.
Answer» SOLUTION :In the higher ANIMALS their development PASSES through stages which are similar to adult stages of lower animals which were their ancestors. For e.g. The tadpole larva of frog REPRESENTS its fish like ancestors.

Discussion

10986.	Question : Onglole cattle is the general utility breed of
Answer» orissa andhroa pradesh gujarat BIHAR ANSWER :B

Discussion

10987.	Question : One time fertilization is the characteristics feature of majority of plants but angiosperm shows two times of fertilization. Name the products and ploidy
Answer» SOLUTION :ZYGOTE (2N) PEN (3N)

Discussion

10988.	Question : One time fertilization is the characteristics feature of majority of plants but angiosperm shows two times of fertilization. Two fusion occursare different. Name it and write down the number of nuclei involved in such process.
Answer» SOLUTION :Syngamy. TWO NUCLEI TRIPLE FUSION, three nuclei

Discussion

10989.	Question : One the bais of heavy chains, immunoglobulins are classified into how many types ?
Answer» TWO THREE FOUR FIVE ANSWER :D

Discussion

10990.	Question : One plantis grown in the shade of a green house and the other is grown undera forest canopy what would be the effect of these two type of shades on the rate of phtosynthesis
Answer» the rate of photosynthesis WOULDBE equally low in both the types of shade the rate of phtosynthesis would be greaterunder the FOREST canopy the rate of photosyntesiswould be greaterin the shade of agreen house the shade of green house or a forest canopy would not INFLUENCE the rate of phtosynthesis because only 1% of sunlightis USED in photosynthesis Answer :C

Discussion

10991.	Question : One pair of hearts in earthworm occur in segments
Answer» 9,10,14 and 15 7,9,12 and 13 6,7, 9 and 10 None of them ANSWER :B

Discussion

10992.	Question : One of the types of ecological pyramids is given here. This type represents
Answer» PYRAMID of NUMBERS in a grassland pyramid of BIOMASS in a FALLOW land pyramid of numbers in a forest energy pyramid in a spring Answer :C

Discussion

10993.	Question : Oneof the syntheticauxn is
Answer» IAA GA IBA NAA Answer :D

Discussion

10994.	Question : Oneof the similarities between DNA and RNA is that both :
Answer» are POLYMERS of nucleotide are CAPABLE of replicating have SIMILAR sugar have similar PYRIMIDINE bases Answer :A

Discussion

10995.	Question : One of the oldest, best preserved and most complete hominid fossil commonly knownas 'lucy' belongs to the genus
Answer» Australopithecus Oreopithecus Dryopithecus Pithecanthropus. Solution :In 1881, Donald JOHNSON, FOUND a 3.2 milion. Years old skeleton of a female HUMAN ancestor. He NICKNAMED it LUCKY's scientific name is Australopitheucs afranensis.

Discussion

10996.	Question : One of the objectives of plant breeding is to develop disease, insect and pest resistant varieties.
Answer» ANSWER :1

Discussion

10997.	Question : One of the reasons why haploids are considered more suitable than diploids for the study of mutation is that the haploids
Answer» Have shorter generation time Have small number of chromosomes Allowexpression of RECESSIVE MUTATIONS immediately (or in first generation) Can be obtained in large number to give CORRECT estimate of MUTATION THEORY Answer :C

Discussion

10998.	Question : One of the most resistant biological material known is(A) sporopollenin(B) hemicellulose(C) lignocellulose(D) lignin
Answer» sporopollenin hemicellulose lignocellulose lignin Answer :A

Discussion

10999.	Question : One of the methods by which DNA cannotbe transferred to host cell by :
Answer» The concerned bacillus has antitoxin Bt protein existsas ACTIVE toxin in the bacillus The INACTIVE protein gets converted into active form in the INSECT gut. Activated toxin enters ovaries of PEST and sterillize them. Answer :C

Discussion

11000.	Question : One of the most important functions of botanical gardens is that
Answer» one can observe tropical PLANTS there they ALLOW exsitu conservation of germplasm they PROVIDE the natural HABITAT for wild life they Provide a beautiful area for recreation Answer :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : Orchid flower, Ophrys co-evolves to maintain resemblance of its petal to female bee. Explain how and why does is do so ?

Question :Oral contraceptive pills are used by female to check

Question : Oral contraceptive is composed of

Question : Oral contraceptive pills are composed of :

Question : Oral contraceptive are prescribed in females to check :

Question : Ora serrata is

Question : Opium is obtained from :

Question : Optimal temperature for spermatogenesis :-

Question : Opium is not much clinically used because :-

Question : Optic lobes are the centres for_____.

Question : Optic chiasma is formed by crossing_____nerves.

Question : Opioids is obtained from .

Question : Ophrys is a Mediterranean orchid it's petals shows resemblance to female be in color size and markings but amle bee come into the flower and pollinateWhich is interaction used to explain pollination method mentioned above.

Question : Ophrys is a Mediterranean orchid it's petals shows resemblance to female be in color size and markings but amle bee come into the flower and pollinateName the sexual decite between male bees and orchid

Question : Opiate narcotic is :

Question : Ophrys an orchid resembling the female of an insect so as to able to get pollinated is due to phenomenon of

Question : Opening of stomata is due to

Question : Fill in the blanks: Operon concept was given by __________.

Question : Opening of a flower and drooping of a bud are examples of:

Question : Open type of circulatory system is the system in which blood is pumped out of the heart and the cells and tissues are directly bathed in it. This type of circulatory system is found in :-

Question : Opening and closing of stomata is due to

Question : Open Book Assessment 'Healthy reproduction, legally checked birth control measures and proper family planning programmes are essential for the survival of mankind' Justify.

Question : Oparin and Haldane's theory of chemical evolution of life was experimentally supported by

Question : Opaque white appearance of white matter is due to :-

Question : Opacity of eye lens leads to

Question : Oparin and Haldane

Question : OP of the cell can be measured by:

Question : Oogenesis takes place in corpus luteum. (True/False)

Question : Oogenesis takes placein corpus luteum. (True/False)

Question : Oocyte is liberated from overy under the influence of LH,after compieting :

Question : Oogamous reproduction in algae involves

Question : Ontogeny recapitulates phylogeny, this theory is called

Question : Ontogeny Recapitulates Phylogeny' is narrated in which of the evidences for organic evolution?

Question : Onset of menstruation of human female is called

Question : Ontogeny recapitulates phylogeny. Discuss.

Question : Onglole cattle is the general utility breed of

Question : One time fertilization is the characteristics feature of majority of plants but angiosperm shows two times of fertilization. Name the products and ploidy

Question : One time fertilization is the characteristics feature of majority of plants but angiosperm shows two times of fertilization. Two fusion occursare different. Name it and write down the number of nuclei involved in such process.

Question : One the bais of heavy chains, immunoglobulins are classified into how many types ?

Question : One plantis grown in the shade of a green house and the other is grown undera forest canopy what would be the effect of these two type of shades on the rate of phtosynthesis

Question : One pair of hearts in earthworm occur in segments

Question : One of the types of ecological pyramids is given here. This type represents

Question : Oneof the syntheticauxn is

Question : Oneof the similarities between DNA and RNA is that both :

Question : One of the oldest, best preserved and most complete hominid fossil commonly knownas 'lucy' belongs to the genus

Question : One of the objectives of plant breeding is to develop disease, insect and pest resistant varieties.

Question : One of the reasons why haploids are considered more suitable than diploids for the study of mutation is that the haploids

Question : One of the most resistant biological material known is(A) sporopollenin(B) hemicellulose(C) lignocellulose(D) lignin

Question : One of the methods by which DNA cannotbe transferred to host cell by :

Question : One of the most important functions of botanical gardens is that