24277 + Interview Questions in Biology in Class 12 Page 204 InterviewSolution

10151.	Question : Pollination in Triticum plant is :
Answer» Anemophilous Hydrophilous Entomophilous Zoophilous Answer :A

Discussion

10152.	Question : Pollination in Gymonsperms in different from Angiosperms 's -Give reasons.
Answer» SOLUTION :In gymnosperms the Ovules are exposed and the pollens are DEPOSITED directly on it. HENCE pollinatino is indired, as the pollens are deposited on the STIGMA of PISTIL.

Discussion

10153.	Question : Pollination In Gymnosperms is different Angiosperms' – Given reasons.
Answer» SOLUTION :

Discussion

10154.	Question : Pollination by wind is
Answer» zoophily entomophily hydrophily anemophily Answer :D

Discussion

10155.	Question : Pollination by wind.
Answer» ANSWER :ANEMOPHILY

Discussion

10156.	Question : The pollination preferred by snails .
Answer» Entomophilous Ornitophilous Anemophilous Malacophilous Answer :D

Discussion

10157.	Question : Pollination by snails …………… .
Answer» Ornithophily Entomophily Malacophily Myrmecophily Answer :A::C

Discussion

10158.	Question : Pollination by birds is called Chiropterophily
Answer» TRUE False Answer :ORNITHOPHILY

Discussion

10159.	Question : Pollination by ants is :
Answer» MALACOPHILY myrmecophily Orithophily Entomophily Answer :B

Discussion

10160.	Question : Pollination by Ants _____
Answer» Malacophily Entomophily Myrmecophily Chiroterophily. Answer :C

Discussion

10161.	Question : Pollination between flowers borne on two different plants of the same species refers to:
Answer» Xenogamy Geitonogamy Autogamy Homogamy Answer :A

Discussion

10162.	Question :Pollinating species of wasps show mutualism with specific 5g plants. Mention the benefits the female wasps derive from the fig trees from such an interaction
Answer» Solution : The female wasp USES the fruit not only as an ovipositian (egglaying) site but also uses the DEVELOPING seeds within the fruit for nourishing its larvae. The wasp POLLINATES the fig inflorescence while searching for SUITABLE egg-laying site. In return for the favour of pollination the fig offers the wasp its devleoping seeds, as FOOD for the developing wasp Larvae

Discussion

10163.	Question : Pollen tubes enters the embryo sac through
Answer» Integument Micropyle Calaza Funicle Answer :B

Discussion

10164.	Question : Pollen tube usually enters the embryo sac :
Answer» Between one synergid and CENTRAL cell By knocking of ANTIPODAL cell Through one of synergids Directly penetrate the egg Answer :A

Discussion

10165.	Question : Pollen tube is composed of(A) pectin(B) cutin(C) sporopollenin(D) pecto-cellulose
Answer» pectin cutin sporopollenin pecto-cellulose Answer :D

Discussion

10166.	Question : Pollen tube growth occurs through the stylar region and reach micropyle of ovule. Name the special cellular thickening that guides Pollen tube.
Answer» SOLUTION :Filliform APPARATUS

Discussion

10167.	Question : Pollen 'sac in Cycas is called:
Answer» Megasporophyll Megasporangium Microsporophyll Microsporangium Answer :D

Discussion

10168.	Question : Pollengrains of some of the plants germinate on stigma soon but they burst in wateror dilutesugar solution
Answer» Plasmolysis IMBIBITION Endosmosis Exosmosis Solution :By Endosmosis they take the WATER inside and thus BURST

Discussion

10169.	Question : Pollen grains of many plants are found to be allergic. Give examples.
Answer» SOLUTION :PARTHENIUM, acasia

Discussion

10170.	Question : Pollen-grains of a plant whose 2n = 28 are cultured to get callus by tissue culture method. What would be the number of chromosomes in the cells of the callus?
Answer» 14 56 28 21 Solution :14

Discussion

10171.	Question : Pollen grains of a plants (2n = 28) are cultured to get callus by tissue culture method. What would be the number of chromosomes in the cells of the callus ?
Answer» 14 56 28 21 Answer :A

Discussion

10172.	Question : Pollen grains of flower pollinated by wind or insects are not…..(A) rough and sticky(B) large and showy(C) rough and dry(D) smooth and dry
Answer» ROUGH and sticky large and showy rough and dry smooth and dry Answer :D

Discussion

10173.	Question : Pollen grains in angiosperms are not motile. They have to be carried to the stigma by external agents. Name the process of transfer of pollen grains.
Answer» SOLUTION :Transfer of pollen GRAINS from the anther to the STIGMA is called POLLINATION.

Discussion

10174.	Question : Pollen grains in angiosperms are not motile. They have to be carried to the stigma by external agents. Write the name of three such agents.
Answer» SOLUTION :WIND, WATER and ANIMALS

Discussion

10175.	Question : Pollen grains can be stored for several years in liquid nitrogen having a temperature of
Answer» (A) -80˚C (B) -196˚C (C) -120˚C (D) -160˚C Answer :B

Discussion

10176.	Question : Pollen grains can be stored for several years in liquid nitrogen having a temperature of(A) -160^(@)C(B) -120^(@)C(C) -196^(@)C(D) -80^(@)C
Answer» `-160^(@)C` `-120^(@)C` `-196^(@)C` `-80^(@)C` Answer :C

Discussion

10177.	Question : Pollen grains are well preserved as fossils because of the presence of
Answer» Lignin Pectin cellulose Sporopollenin Answer :D

Discussion

10178.	Question : Pollen grains are well preserved as fossil for many years due to some characteristics Give reasons
Answer» SOLUTION :SPOROPOLLENIN

Discussion

10179.	Question : Pollen grains are stored for long period without losing its viability in
Answer» LIQUID nitrogen liquidsulphur liquidsulphur at -`196°c` liquidsulphur at `-196.5°c` ANSWER :A

Discussion

10180.	Question : Pollen grains are non-green due to :
Answer» ABSENCE of PLASTIDS Degeneration of plastids Conversion of plastids into chromoplasts Attraction of vectors Answer :C

Discussion

10181.	Question : Pollen grains are able to tolerate extremes of temperature and desiccation because their exine consists of:
Answer» Cutin Suberin Sporopollenin Callose Answer :C

Discussion

10182.	Question : Pollen grain hasprominentapeturescalled _______.
Answer» SOLUTION :GERMPORE

Discussion

10183.	Question : Pollen grain.
Answer» SOLUTION :

Discussion

10184.	Question : Pollen deposits on another flower of same individual plant is called ………….. .
Answer» Geitonogamy Xenogamy Homogamy Cleistogamy Answer :A

Discussion

10185.	Question : Pollen chamber is not found in the ovules of:
Answer» Monocats Monocots and dicots Only dicots All of these Solution :N//A

Discussion

10186.	Question : Pollen basket is
Answer» a BASKET MADE of pollen a SIMPLE basket ANSWER :D

Discussion

10187.	Question : Pollen allergy that causes chronic respiratory disorders in men like asthma and bronchitis. Name the causative plant.
Answer» SOLUTION :PARTHENIUM orCarrot GRASS

Discussion

10188.	Question : Polidy levelof Nucellus, endosperm, polar nuclei, Megaspore mother cell, female gametophyte respectively are
Answer» (A) 2N, 3N, N, 2n, n (B)2n, 3n, 2n, n, n (C) n, 2n, n, 2n, n (D) 2n, 3n, 2n, 2n, n Answer :A

Discussion

10189.	Question : Polarity of DNA is determined by:
Answer» SUGAR phosphate purine pyrimidine Answer :A

Discussion

10190.	Question :Polar bodies are formed during:
Answer» SPERMATOGENESIS Oogenesis Fertilization Cleavage ANSWER :B

Discussion

10191.	Question : Points which are correct with respect to cardiac muscle ? (i) Have dark and light bands (ii) Involuntory in nature (iii) Similar to smooth muscle in structure (iv) Muscle fibres are branched, cylindrical (v) get fatigued after a long period.
Answer» (i), (II), (iii) (i), (ii), (IV) (iii), (iv), (V) (i), (iii), (v) Answer :B

Discussion

10192.	Question : Pointing towards a girl, Abhishek says, "This girl is the daughter of my father's only child." What is the relation of Abhishek's wife to that girl?
Answer» Daughter Mother AUNT Aunt Solution :Only the childof myfathermeans 'Abhishek' himself. Thismeansthe girlis THEDAUGHTER ofAbhishek. Hence, Abhishek'swifeis themotherof THEGIRL.

Discussion

10193.	Question : Pointout the factors that affects the photosynthetically active radiation.
Answer» Solution :PAR is not always constant because of clouds, TREE SHADES, air, DUST particles, SEASONS, latitudes and length of the daylight availability.

Discussion

10194.	Question : Point out the uses of sugarcane.
Answer» Solution :Sugar cane is the raw material for extracting white sugar. Sugarcane SUPPORTS large number of industries like sugar mills producing REFINED sugars, distilleries producing liquor grade ethanol and millions of jaggery MANUFACTURING units. Fresh sugarcane JUICE is a refreshing drink. Molasses is the raw material for the PRODUCTION of ethyl alcohol.

Discussion

10195.	Question : List the signs and symptoms of mental depression.
Answer» SOLUTION :Signs and symptoms of MENTAL DEPRESSION:Loss of self confidence and self esteem Anxiety Not being able to enjoy things that are USUALLY PLEASURABLE or intersting

Discussion

10196.	Question : List out the objectives of plant breeding.
Answer» Solution :(.) To INCREASE YIELD, vigour and fertility of the crop (.) To increase tolerance to environmental CONDITION, salinity, temperature and drought. (.) To prevent the premature falling of buds and fruits, etc. (.) To improve synchronous maturity. (.) To develop resistance to pathogens pests. (.) To develop photosencitive and thermos-sensitive VARIETIES.

Discussion

10197.	Question : Point out the nitrogenous bases of RNA.
Answer» SOLUTION :ADENINE, GUANINE, CYTOSINE and URACIL.

Discussion

10198.	Question : Point out the major functions of soil.
Answer» Solution :Soil has four major functions- medium for plant GROWTH means for water STORAGE and purification modifier of Earth.s ATMOSPHERE habitat for MANY organisms, which in TURN modify the soil

Discussion

10199.	Question : What are the human activities that disturb an ecosystem?
Answer» SOLUTION :Direct and indirect human activities have a detrimental effect on biodiversity. Direct human activities like change in local land use, SPECIES introduction or removal, harvesting, pollution and climate change CONTRIBUTE a greater pressure on LOSS of biodiversity. Indirect human drivers include DEMOGRAPHIC, economic, technological, cultural and religious factors.

Discussion

10200.	Question : Point out the function of endosperm.
Answer» Solution :`` It is the NUTRITIVE TISSUE for the developing embryo. `` In MAJORITY of ANGIOSPERMS , the zygote DIVIDES only after the development of endosperm. `**` Endosperm regulates the precise mode of embryo development .

Discussion

Explore topic-wise InterviewSolutions in .

Question : Pollination in Triticum plant is :

Question : Pollination in Gymonsperms in different from Angiosperms 's -Give reasons.

Question : Pollination In Gymnosperms is different Angiosperms' – Given reasons.

Question : Pollination by wind is

Question : Pollination by wind.

Question : The pollination preferred by snails .

Question : Pollination by snails …………… .

Question : Pollination by birds is called Chiropterophily

Question : Pollination by ants is :

Question : Pollination by Ants _____

Question : Pollination between flowers borne on two different plants of the same species refers to:

Question :Pollinating species of wasps show mutualism with specific 5g plants. Mention the benefits the female wasps derive from the fig trees from such an interaction

Question : Pollen tubes enters the embryo sac through

Question : Pollen tube usually enters the embryo sac :

Question : Pollen tube is composed of(A) pectin(B) cutin(C) sporopollenin(D) pecto-cellulose

Question : Pollen tube growth occurs through the stylar region and reach micropyle of ovule. Name the special cellular thickening that guides Pollen tube.

Question : Pollen 'sac in Cycas is called:

Question : Pollengrains of some of the plants germinate on stigma soon but they burst in wateror dilutesugar solution

Question : Pollen grains of many plants are found to be allergic. Give examples.

Question : Pollen-grains of a plant whose 2n = 28 are cultured to get callus by tissue culture method. What would be the number of chromosomes in the cells of the callus?

Question : Pollen grains of a plants (2n = 28) are cultured to get callus by tissue culture method. What would be the number of chromosomes in the cells of the callus ?

Question : Pollen grains of flower pollinated by wind or insects are not…..(A) rough and sticky(B) large and showy(C) rough and dry(D) smooth and dry

Question : Pollen grains in angiosperms are not motile. They have to be carried to the stigma by external agents. Name the process of transfer of pollen grains.

Question : Pollen grains in angiosperms are not motile. They have to be carried to the stigma by external agents. Write the name of three such agents.

Question : Pollen grains can be stored for several years in liquid nitrogen having a temperature of

Question : Pollen grains can be stored for several years in liquid nitrogen having a temperature of(A) -160^(@)C(B) -120^(@)C(C) -196^(@)C(D) -80^(@)C

Question : Pollen grains are well preserved as fossils because of the presence of

Question : Pollen grains are well preserved as fossil for many years due to some characteristics Give reasons

Question : Pollen grains are stored for long period without losing its viability in

Question : Pollen grains are non-green due to :

Question : Pollen grains are able to tolerate extremes of temperature and desiccation because their exine consists of:

Question : Pollen grain hasprominentapeturescalled _______.

Question : Pollen grain.

Question : Pollen deposits on another flower of same individual plant is called ………….. .

Question : Pollen chamber is not found in the ovules of:

Question : Pollen basket is

Question : Pollen allergy that causes chronic respiratory disorders in men like asthma and bronchitis. Name the causative plant.

Question : Polidy levelof Nucellus, endosperm, polar nuclei, Megaspore mother cell, female gametophyte respectively are

Question : Polarity of DNA is determined by:

Question :Polar bodies are formed during:

Question : Points which are correct with respect to cardiac muscle ? (i) Have dark and light bands (ii) Involuntory in nature (iii) Similar to smooth muscle in structure (iv) Muscle fibres are branched, cylindrical (v) get fatigued after a long period.

Question : Pointing towards a girl, Abhishek says, "This girl is the daughter of my father's only child." What is the relation of Abhishek's wife to that girl?

Question : Pointout the factors that affects the photosynthetically active radiation.

Question : Point out the uses of sugarcane.

Question : List the signs and symptoms of mental depression.

Question : List out the objectives of plant breeding.

Question : Point out the nitrogenous bases of RNA.

Question : Point out the major functions of soil.

Question : What are the human activities that disturb an ecosystem?

Question : Point out the function of endosperm.