Pollination and its agents — practice questions

Question 1 · difficulty L3 · understanding

Which one of the following types of pollination brings genetically different types of pollen grains to the stigma?

• A. Autogamy
• B. Xenogamy
• C. Geitonogamy
• D. Cleistogamy

Question 2 · difficulty L3 · understanding

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Both wind and water pollinated flowers are not very colourful and do not produce nectar. Reason (R) : The flowers produce enormous amount of pollen grains in wind and water pollinated flowers. In the light of the above statements, choose the correct answer from the options given below:

• A. $\mathbf{A}$ is true but $\mathbf{R}$ is false
• B. $\mathbf{A}$ is false but $\mathbf{R}$ is true
• C. Both $\mathbf{A}$ and $\mathbf{R}$ are true and $\mathbf{R}$ is the correct explanation of $\mathbf{A}$
• D. Both $\mathbf{A}$ and $\mathbf{R}$ are true but $\mathbf{R}$ is NOT the correct explanation of $\mathbf{A}$

Question 3 · difficulty L3 · understanding

Given below are two statements : Statement I : Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it. Statement II : Fig wasp and fig tree exhibit mutual relationship as fig wasp completes its life cycle in fig fruit and fig fruit gets pollinated by fig wasp. In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Statement I is correct but statement II is incorrect
• B. Statement I is incorrect but statement II is correct
• C. Both statement I and statement II are correct
• D. Both statement I and statement II are incorrect

Question 4 · difficulty L3 · understanding

Identify the set of correct statements: A. The flowers of Vallisneria are colourful and produce nectar. B. The flowers of water lily are not pollinated by water. C. In most of water-pollinated species, the pollen grains are protected from wetting. D. Pollen grains of some hydrophytes are long and ribbon like. E. In some hydrophytes, the pollen grains are carried passively inside water. Choose the correct answer from the options given below.

• A. C, D and E only
• B. A, B, C and D only
• C. A, C, D and E only
• D. B, C, D and E only

Question 5 · difficulty L3 · understanding

Identify the correct description about the given figure :

• A. Wind pollinated plant inflorescence showing flowers with well exposed stamens.
• B. Water pollinated flowers showing stamens with mucilaginous covering.
• C. Cleistogamous flowers showing autogamy.
• D. Compact inflorescence showing complete autogamy

Question 6 · difficulty L3 · understanding

In which of the following sets of families, the pollen grains are viable for months?

• A. Solanaceae, Poaceae and Liliaceae
• B. Brassicaceae, Liliaceae and Poaceae
• C. Rosaceae, Liliaceae and Poaceae
• D. Leguminosae, Solanaceae and Rosaceae

Question 7 · difficulty L3 · understanding

Transfer of pollen grains from anther to stigma of another flower of same plant is known as :

• A. Geitonogamy
• B. Xenogamy
• C. Autogamy
• D. Cleistogamy

Question 8 · difficulty L3 · understanding

Large, colourful, fragrant flowers with nectar are seen in

• A. Bird pollinated plants
• B. Bat pollinated plants
• C. Wind pollinated plants
• D. Insect pollinated plants

Question 9 · difficulty L3 · understanding

Given below are two statements : One labelled as Assertion A and the other labelled as Reason R : Assertion A : In gymnosperms the pollen grains are released from the microsporangium and carried by air currents. Reason R : Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed. In the light of the above statements, choose the correct answer from the options given below :

• A. Both A and R are true but R is NOT the current explanation of A
• B. A is true but R is false
• C. A is false but R is true
• D. Both A and R are true and R is the correct explanation of A

Question 10 · difficulty L3 · understanding

To ensure that only the desired pollens fall on the stigma in artificial hybridization process (a) the female flower buds of plant producing unisexual flowers need not be bagged. (b) there is no need to emasculate unisexual flowers of selected female parent (c) emasculated flowers are to be bagged immediately after cross pollination (d) emasculated flowers are to be bagged after removal of anthers (e) bisexual flowers, showing protogyny are never selected for cross Choose the correct answer from the options given belows

• A. (a), (d) and (e) only
• B. (a), (b) and (c) only
• C. (b), (c) and (d) only
• D. (b), (c) and (e) only