Xenogamy

Q. Which of the following will not decrease inbreeding depression?

1. Cross-pollination.
2. Producing unisexual flowers.
3. Unsynchronised pollen release and stigma receptivity.
4. Anther and stigma growing up to same height in a bisexual flower.

Q. Match the following columns and choose the correct option.
$\begin{array}{cc}\text{Column 1}& \text{Column 2}\\ \text{A. Autogamy}& \text{i. Transfer of pollen grains from anther}\\ & \text{to the stigma of a different plant.}\\ \text{B. Xenogamy}& \text{ii. Transfer of pollen grains from the anther to}\\ & \text{the stigma of another flower of the same plant.}\\ \text{C. Geitonogamy}& \text{iii. Transfer of pollen grains from the}\\ & \text{anther to the stigma of the same flower.}\end{array}$

1. A-i, B-ii, C-iii
2. A-iii, B-i, C-ii
3. A-iii, B-ii, C-i
4. A-ii, B-iii, C-i

Q. Self-incompatibility prevents pollen tube formation by pollen grains on the stigma of the__________.

1. same flower
2. other flowers of the same plant
3. both a and b
4. none of the above

Q. Inbreeding depression is:

1. Decreased productivity due to mating of superior male and inferior female
2. Reduced fertility and productivity due to continued close inbreeding
3. Reduced motility and immunity due to close inbreeding
4. Decrease in body mass of progeny due to continued close inbreeding

Q.

Which of the following types of pollination lead to genetic variation?

1. Autogamy

2. Geitonogamy

3. Xenogamy

4. Both B and C

Q.

Most efficient adaptation that favours cross pollination is dicliny.

1. True

2. False

Q.

Which of the following pollination mechanism/s results in cross fertilisation?

1. Autogamy

2. Geitonogamy

3. Xenogamy

4. Geitonogamy and Xenogamy

Q. Self-incompatibility prevents pollen tube formation by pollen grains on the stigma of the__________.

1. same flower
2. other flowers of the same plant
3. both a and b
4. none of the above

Q.

Which type of pollination is possible in a plant with bisexual flowers?

1. autogamy, geitonogamy and xenogamy

2. geitonogamy and xenogamy

3. xenogamy and cleistogamy

4. autogamy

Q. Pop the bubbles with outbreeding devices exhibited by flowers.

1. Bisexuality
2. Unisexuality
3. Heterostyly
4. Homostyly
5. Protandry
6. Homogamy
7. protogyny
8. Self sterility