919 + Interview Questions in SEXUAL-REPRODUCTION-IN-FLOWERING-PLANTS IN GENERAL AWARENESS Page 4 InterviewSolution

151.	Hormone group responsible for breaking see dormancy 1. ABA 2. Cytokinin 3. Auxin 4. GibberellinA. 1,3B. 1,2,4C. 2,3,4D. 1,2,4
Answer» Correct Answer - C Hormone group responsible for breaking seed dormancy are Cytokinin, Auxin and Gibberellin.

Discussion

152.	A method of breaking dormancy and allowing ample absorption of water isA. StratificationB. ScarificationC. VernalisationD. Devernalisation
Answer» Correct Answer - B A method of breaking dormancy and allowing ample absorption of water is scarification.

Discussion

153.	Among the following which compound can induce seed dormancyA. GibberellinsB. CaffeineC. ABAD. Potassium nitrate
Answer» Correct Answer - C ABA can induce seed dormancy.

Discussion

154.	Emasculation is not required when flowers areA. bisexualB. intersexualC. unisexualD. Either A and B
Answer» Correct Answer - C

Discussion

155.	Seeds show dormancy due to:A. Formation of impermeable seed coatB. Formation of dormineC. Immature embryoD. All of the above
Answer» Correct Answer - D

Discussion

156.	Assertion. Seeds fails to geminate at very low and high temperature . Reason. Seeds sown deep into the soil fail to germinate .A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion .B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion .C. If Assertion is true and but the Reason is false.D. If both Assertion and Reason are false.
Answer» Correct Answer - B

Discussion

157.	Match the Column I and Column II and select the correct option using the codes given below A. a-i, b-ii, c-iv, d-iiiB. a-iii, b-i, c-iv, d-iiC. a-iv, b-iii, c-i, d-iiD. a-ii, b-i,c-iv, d-iii
Answer» Correct Answer - B

Discussion

158.	Refer to the given statements. (i) Both wind and water pollinated flowers are not very colourful and do not produce nectar. (ii) Entomophilous flowers are large, colourful, fragrant and rich in nectar. (iii) Kigelia pinnata is an insect pollinated flower. Which of the above statement is/are incorrect ?A. (i) onlyB. (ii) onlyC. (iii) onlyD. (i),(ii) and (iii)
Answer» Correct Answer - C Kigelia pinnata (sausage tree) is an example of chiropterophilous flower. In chiropterphily, cross pollination is performed by bats. Chiropterophilous flowers are dull-coloured with strong fermenting or fruit odour, abundant nectar and pollen grains.

Discussion

159.	Which of the following statements is not correct?A. Insects that consume pollen or nectar without bringing about pollination are called pollen nectar robbersB. Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistilC. Some reptiles have also been reported as pollinators in some plant speciesD. Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style
Answer» Correct Answer - D Pollen grains of different species are incompatible, so they fail to germinate. Only the pollen of the same species germinate and can form pollen tube which grows and family dispatches male gamete to embryo sac.

Discussion

160.	Pollination in water by hyacinth and water lily is brought about by the agency of:A. waterB. insects or windC. birdsD. bats
Answer» Correct Answer - B Water hyacinth has single spike of 8-15 conspicuous attractive flowers which attract bees and other insects. These insects pollinate them. This plant is an aquatic weed. Water lily is also an aquatic plant with large conspicuous coloured flowers. Most of the species are bee pollinated except few species where wind pollination occurs. Insects pollinated flowers have coloured petals, big size and they offer fragrance and nectar to attract insects which bring about pollination in them.

Discussion

161.	In majority of angiospermsA. Reduction division occurs in the megaspore mother cellsB. A small central cell is present in the embryo sacC. Egg has a filiform appartusD. There are numerous antipodal cells
Answer» Correct Answer - A

Discussion

162.	In majority of angiosperms:A. Egg has a filifom apparatusB. There are numerous antipodal cellsC. Reduction division occurs in the megaspore another cellsD. A small central occurs is present in the embryo sac.
Answer» Correct Answer - C

Discussion

163.	Many insects may consume pollen or the nectar without bringing about pollination. Such floral visitors are referred to asA. Pollen robbersB. Nectar robbersC. PseudocopulatorsD. Both A and B
Answer» Correct Answer - D Many insects may consume pollen or the nectar without bringing about pollination. Such floral visitors are referred to as pollen or nectar robbers.

Discussion

164.	In majority of angiospermsA. egg has a filliform apparatusB. there are numerous antipodal cellsC. reduction division occurs in the megaspreo mother cellsD. a small central cell is present in the embryo sac
Answer» Correct Answer - C

Discussion

165.	In majority of angiospermsA. egg has a filiform apparatusB. there are numerous anitpodal cellsC. reduction division occurs in the megaspore mothe cellD. a small central cell is present in the embryo sac
Answer» Correct Answer - C

Discussion

166.	Majority of angiosperms produceA. Unisexual flowersB. Bisexual flowersC. Hermaphrodite flowersD. Both B and C
Answer» Correct Answer - D majority of angiosperms produce Bisexual flowers or Hermaphrodite flowers.

Discussion

167.	To study pollen germination, some pollen from flowers such as pea, chickpea, Crotolaria, balsam and Vinca are collected and dusted on a glass slide containing a drop of ..a.. Solution about..b..per cent . After about ..c.. Minutes, pollen tubes coming out of the pollen grains.A. a-Saline, b-5, c-5 to 10B. a-Sugar, b-5, c-10 to 20C. a-Saline, b-10, c-15 to 30D. a-Sugar, b-10,c-15 to 30
Answer» Correct Answer - D To study pollen germination some pollen from flowers such as pea, chickpea, Crotolaria, balsam and Vinca are collected and dusted on a glass slide containing a drop of sugar solution about 10 per cent. After about 15 to 30 minutes. Pollen tubes coming out of the pollen grains.

Discussion

168.	In plants that shed pollen grain at two-celled condition, the generative cell divides and form the two male gametes during theA. Entry of pollen tube in the ovuleB. Entry of pollen tube in the synergidC. Growth of pollen tube in the stigmaD. Growth of pollen tube in the style
Answer» Correct Answer - C `` In some plants, pollen grains are shed at 2-celled condition (a vegetative cell and a generative cell). In such plants, the generative cell divided and forms the two male gametes during the growth of pollen tube in the stigma. `` In plants which shed pollen in the three-celled condition, pollen tubes carry the two male gametes from the beginning.

Discussion

169.	Assertion : Chasmogamous flowers require pollinating agents Reason : Cleistogamous flowers do not expose their sex organs.A. If both assertion and reason are true and the reason is a correct explanation of the assertion.B. If both assertion and reason are true but reason is not a correct explanation of the assertion.C. If the assertion is true but reason is false.D. If both the assertion and reason are false.
Answer» Correct Answer - B

Discussion

170.	What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.
Answer» Fusion of male gamete with secondary nucleus inside the embryosac (female gemetophyte ) of angiosperms is called triple fusion. It involves fusion of one male gamete nucleus and two polar nuclei.

Discussion

171.	Mention two strategies evolved to prevent self-pollination in flowers.
Answer» Cross-pollinating flowers develop the following strategies to prevent self-pllination: 1. Protogyny ( when gynoecium matures earlier than androecium ) or Protandry ( when androecium matures and shed pollen before maturation of gynoecium). 2. Self incompatibility.

Discussion

172.	(i ) Write the characteristics features of anther, pollen and stigma of wind polinated flowers. (ii) How do flowers reward their insect pollinators ? Explain.
Answer» (ii) Pollens provide nutrition , and nectar is an important source of food for insect pollinators. Some flowers provide space for shelter and reproduction for pollinators also.

Discussion

173.	Match the item in column (A) with column (B) . Each point in column (A) has minimum one match in colulmn (B) and maximum two matches.
Answer» 1.(iu), 2.(d),(h) , 3, (g), (4) (a), 5,( c) , 6. (f) ,7, (b) (e )

Discussion

174.	Tegmen of seed develops from:A. Outer integumentB. Inner integumentC. Third intergumentD. Nucellus
Answer» Correct Answer - B

Discussion

175.	What is the function of germ pore?A. Initiation of pollen tubeB. Release of male gametesC. Emergence of radicleD. Absorption of water for seed germination
Answer» Correct Answer - A

Discussion

176.	Which one of the following statement is wrong ?A. Pollen grains in some plants remainviable for monthsB. Intine is made up of cellulose and pectinC. When pollen is sheed at two -celled state, double fertilization does not take placeD. Vegetative cell is larger than generative cell
Answer» Correct Answer - C

Discussion

177.	Which one of the following statement is wrong ?A. When pollen is shed at two-celled stage, double fertilization does not take placeB. Vegetative cell is larger than generative celC. Pollen grain is some plants remain viable for monthsD. Intine is made up of cellulose and pectine.
Answer» Correct Answer - A

Discussion

178.	Which one of the following statements is wrongA. when polen is shed at two celled stage double fertizlation does not take placeB. vegetative cell is larger than generatvioe cellC. pollen grains in some plants remains viable for monthsD. intine is made up of cellulose and pectin
Answer» Correct Answer - A

Discussion

179.	Plants with ovaries having only one ore a few ovules are generally pollinated byA. WindB. BeesC. ButterfliesD. Birds
Answer» Correct Answer - A

Discussion

180.	Plants with ovaries having only one ore a few ovules are generally pollinated byA. beesB. butterfileesC. birdsD. wind
Answer» Correct Answer - D

Discussion

181.	Assertion. Fruits are formed only in angiosperm . Reason . Fruits develop from ovaries which are found only in angiosperm .A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion .B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion .C. If Assertion is true and but the Reason is false.D. If both Assertion and Reason are false.
Answer» Correct Answer - A

Discussion

182.	Proximal end of the filament of stamen is attached to theA. connectiveB. placentaC. thalamus or petalD. anther
Answer» Correct Answer - C A typical stamen consist of anther and filament. The proximal end of filament is attached to thalamus or petal of the flower whereas distal end beats anther.

Discussion

183.	Which one of the following statements is not true ?A. Exine of pollen grains is made up of sporopolleninB. Pollen grains of many species cause severe allergiesC. Stored pollen in liquid nitrogen can be used in the crop breeding programmesD. Tapetum helps in the dehiscence of anther
Answer» Correct Answer - D Tapetum is the inner layer of microsporangium (anther) which provides nourishment to developing pollen grain after meiotic cell division.

Discussion

184.	Seed formation without fertilization in flowering plants involves the process ofA. Somatic hybridizationB. ApomixisC. SporulationD. Budding
Answer» Correct Answer - B `` Although seeds, in general are the products of fertilisation, a few flowering plants such as some species of Asteraceae and grasses, have evolved a special mechanism, to produce seeds without fertilisation, called apomixis. `` Apomixis is a form of asexual reproduction that mimics sexual reproduction. Apomixis is a type of asexual reproduction.

Discussion

185.	Seed formation without fertilization in flowering plants involves the process of:A. SporulationB. BuddingC. Somatic hybridizationD. Apomixis
Answer» Correct Answer - D

Discussion

186.	Which of the following statements is not correctA. Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbesB. Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistillC. Some reptiles have also been reported as pollinators in some plant speciesD. Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style
Answer» Correct Answer - D

Discussion

187.	After double fertilization, a mature ovule hasA. 1 diploid and 1 haploid cellB. 1 diploid and 1 triploid cellC. 2 haploid and 1 triploid cellD. 1 haploid and 1 triploid cell
Answer» Correct Answer - B After double fertilization, embryo sac ovule comes to have 1 diploid, (zygote) and 1 triploid cell (PEC).

Discussion

188.	Seed formation without fertilization in flowering plants involves the process ofA. BuddingB. Somatic hybridisationC. ApomixisD. Sporulation
Answer» Correct Answer - C

Discussion

189.	Wind pollinated flowers areA. small producing nectar and dry pollenB. small brightly colored producing large number of pollen grainsC. small producing large no. of pollen grainsD. large producing abundant nectar and pollen.
Answer» Correct Answer - C

Discussion

190.	Cross pollination in crop plant is known asA. ChalazogamyB. CleistogamyC. AutogamyD. Allogamy
Answer» Correct Answer - D

Discussion

191.	Wind pollinated flowers areA. small, brightly coloured, producing large number of pollen grainsB. small, producing large number of dry pollen grainsC. large, producing abundant nectar and pollenD. small, producing nectar and dry pollen
Answer» Correct Answer - B Pollination taking place by means of wind is known as anemophily, e.g. Zea mays, Cannabis Pinus, etc. Anemophilous flowers are small and produces large number of pollen grains which are dry, powdery light and non-sticky.

Discussion

192.	Growth of pollen tube towards embryo sac isA. GeotropismB. ThigmotropismC. ChemotropismD. All of these
Answer» Correct Answer - C

Discussion

193.	Growth of pollen tube towards embryo sac isA. GeotropismB. ThigmotropismC. ThermotropismD. Chemotropism
Answer» Correct Answer - D

Discussion

194.	Which one of the following is resistant actionA. CorkB. Wood fibreC. Pollen exineD. Leaf cuticle
Answer» Correct Answer - C Pollen exine is resistant to enzyme acition. The pollen wall is consisted of two layers, the outer exine and inner intine. The exine is chiefly made up of sporopollenin, which is derived by the oxidative polymerisation of carotenoids. Sporopollenin is one of the most resistant biological materials known. Exine is thin in beginning but become very thick with maturity.

Discussion

195.	For good growth of pollen tube, necessary element isA. campylotropousB. BirdsC. MgD. Most common type of ovule-Orthotropous
Answer» Correct Answer - B Boron (B) is an essential microelement of trace element, which is required for pollen germination, good growth of pollen tube and fertilisation.

Discussion

196.	The plant part which consists of two generations one within the other isA. SeedB. Germinated pollen grainC. EmbryoD. Unfertilised ovule
Answer» Correct Answer - D Plant part having two generations, one within the other is unfertilised ovule.

Discussion

197.	Which one of the following statements is not true?A. Pollen grains are released from anthers at 2-celled stateB. Sporogenous cell directly behaves as the megaspore mother cellC. Megaspore divides twice to form an eight nucleate embryo sacD. Egg and synergids always lie near the micropylar end of ovule
Answer» Correct Answer - C Megaspore mother cell is developed inside the nucellus and by a meiotic division, it forms four megasores. Out of these, generally three degenerate and remaining one is called functional megaspore. It undergoes mitosis three times without cytoplasmic division to form an eight nucleate embryo sac. Hence, statement c. is not true.

Discussion

198.	The plant part which consists of two generations one within the other isA. germinated pollen grainB. embryoC. unfertilised ovuleD. seed
Answer» Correct Answer - D The embryo (2n) is surrounded by female gametophyte (n) , the latter by seed coat (2n). In this way, seed contains three generations locked one within the another. Of these, two generations occur within the embryo.

Discussion

199.	Which one of the following is resistant actionA. leaf cuticleB. corkC. wood fibreD. pollen exine
Answer» Correct Answer - D

Discussion

200.	Male gametes in angiosperms are formed by the division ofA. microsperoe mother cellB. microspreC. generative cellD. vegetative cell
Answer» Correct Answer - C

Discussion

Explore topic-wise InterviewSolutions in .

Hormone group responsible for breaking see dormancy 1. ABA 2. Cytokinin 3. Auxin 4. GibberellinA. 1,3B. 1,2,4C. 2,3,4D. 1,2,4

A method of breaking dormancy and allowing ample absorption of water isA. StratificationB. ScarificationC. VernalisationD. Devernalisation

Among the following which compound can induce seed dormancyA. GibberellinsB. CaffeineC. ABAD. Potassium nitrate

Emasculation is not required when flowers areA. bisexualB. intersexualC. unisexualD. Either A and B

Seeds show dormancy due to:A. Formation of impermeable seed coatB. Formation of dormineC. Immature embryoD. All of the above

Match the Column I and Column II and select the correct option using the codes given below A. a-i, b-ii, c-iv, d-iiiB. a-iii, b-i, c-iv, d-iiC. a-iv, b-iii, c-i, d-iiD. a-ii, b-i,c-iv, d-iii

Pollination in water by hyacinth and water lily is brought about by the agency of:A. waterB. insects or windC. birdsD. bats

In majority of angiospermsA. Reduction division occurs in the megaspore mother cellsB. A small central cell is present in the embryo sacC. Egg has a filiform appartusD. There are numerous antipodal cells

In majority of angiosperms:A. Egg has a filifom apparatusB. There are numerous antipodal cellsC. Reduction division occurs in the megaspore another cellsD. A small central occurs is present in the embryo sac.

Many insects may consume pollen or the nectar without bringing about pollination. Such floral visitors are referred to asA. Pollen robbersB. Nectar robbersC. PseudocopulatorsD. Both A and B

In majority of angiospermsA. egg has a filliform apparatusB. there are numerous antipodal cellsC. reduction division occurs in the megaspreo mother cellsD. a small central cell is present in the embryo sac

In majority of angiospermsA. egg has a filiform apparatusB. there are numerous anitpodal cellsC. reduction division occurs in the megaspore mothe cellD. a small central cell is present in the embryo sac

Majority of angiosperms produceA. Unisexual flowersB. Bisexual flowersC. Hermaphrodite flowersD. Both B and C

In plants that shed pollen grain at two-celled condition, the generative cell divides and form the two male gametes during theA. Entry of pollen tube in the ovuleB. Entry of pollen tube in the synergidC. Growth of pollen tube in the stigmaD. Growth of pollen tube in the style

What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.

Mention two strategies evolved to prevent self-pollination in flowers.

(i ) Write the characteristics features of anther, pollen and stigma of wind polinated flowers. (ii) How do flowers reward their insect pollinators ? Explain.

Match the item in column (A) with column (B) . Each point in column (A) has minimum one match in colulmn (B) and maximum two matches.

Tegmen of seed develops from:A. Outer integumentB. Inner integumentC. Third intergumentD. Nucellus

What is the function of germ pore?A. Initiation of pollen tubeB. Release of male gametesC. Emergence of radicleD. Absorption of water for seed germination

Which one of the following statement is wrong ?A. Pollen grains in some plants remainviable for monthsB. Intine is made up of cellulose and pectinC. When pollen is sheed at two -celled state, double fertilization does not take placeD. Vegetative cell is larger than generative cell

Which one of the following statement is wrong ?A. When pollen is shed at two-celled stage, double fertilization does not take placeB. Vegetative cell is larger than generative celC. Pollen grain is some plants remain viable for monthsD. Intine is made up of cellulose and pectine.

Which one of the following statements is wrongA. when polen is shed at two celled stage double fertizlation does not take placeB. vegetative cell is larger than generatvioe cellC. pollen grains in some plants remains viable for monthsD. intine is made up of cellulose and pectin

Plants with ovaries having only one ore a few ovules are generally pollinated byA. WindB. BeesC. ButterfliesD. Birds

Plants with ovaries having only one ore a few ovules are generally pollinated byA. beesB. butterfileesC. birdsD. wind

Proximal end of the filament of stamen is attached to theA. connectiveB. placentaC. thalamus or petalD. anther

Which one of the following statements is not true ?A. Exine of pollen grains is made up of sporopolleninB. Pollen grains of many species cause severe allergiesC. Stored pollen in liquid nitrogen can be used in the crop breeding programmesD. Tapetum helps in the dehiscence of anther

Seed formation without fertilization in flowering plants involves the process ofA. Somatic hybridizationB. ApomixisC. SporulationD. Budding

Seed formation without fertilization in flowering plants involves the process of:A. SporulationB. BuddingC. Somatic hybridizationD. Apomixis

After double fertilization, a mature ovule hasA. 1 diploid and 1 haploid cellB. 1 diploid and 1 triploid cellC. 2 haploid and 1 triploid cellD. 1 haploid and 1 triploid cell

Seed formation without fertilization in flowering plants involves the process ofA. BuddingB. Somatic hybridisationC. ApomixisD. Sporulation

Wind pollinated flowers areA. small producing nectar and dry pollenB. small brightly colored producing large number of pollen grainsC. small producing large no. of pollen grainsD. large producing abundant nectar and pollen.

Cross pollination in crop plant is known asA. ChalazogamyB. CleistogamyC. AutogamyD. Allogamy

Wind pollinated flowers areA. small, brightly coloured, producing large number of pollen grainsB. small, producing large number of dry pollen grainsC. large, producing abundant nectar and pollenD. small, producing nectar and dry pollen

Growth of pollen tube towards embryo sac isA. GeotropismB. ThigmotropismC. ChemotropismD. All of these

Growth of pollen tube towards embryo sac isA. GeotropismB. ThigmotropismC. ThermotropismD. Chemotropism

Which one of the following is resistant actionA. CorkB. Wood fibreC. Pollen exineD. Leaf cuticle

For good growth of pollen tube, necessary element isA. campylotropousB. BirdsC. MgD. Most common type of ovule-Orthotropous

The plant part which consists of two generations one within the other isA. SeedB. Germinated pollen grainC. EmbryoD. Unfertilised ovule

The plant part which consists of two generations one within the other isA. germinated pollen grainB. embryoC. unfertilised ovuleD. seed

Which one of the following is resistant actionA. leaf cuticleB. corkC. wood fibreD. pollen exine

Male gametes in angiosperms are formed by the division ofA. microsperoe mother cellB. microspreC. generative cellD. vegetative cell