Pollination And Fertilisation

Question 1

What is cross-pollination?

Answer 1

Pollination between separate plants

Cross-pollination results in higher genetic variance.

Question 2

What is self-pollination?

Answer 2

Pollination within the same plant

Self-pollination results in lower genetic variance.

Question 3

Which type of pollination has a higher chance of success?

Answer 3

Self-pollination

Self-pollination typically has a higher pollination success rate.

Question 4

What are the biotic mechanisms of pollination?

Answer 4

Insects, birds, mammals

These organisms are essential for cross-pollination.

Question 5

What are the abiotic mechanisms of pollination?

Answer 5

Wind, water

These factors can facilitate the transfer of pollen without living organisms.

Question 6

What attractions do plants use for pollination?

Answer 6

Scent, markings, nectar production, UV-visible landing strips

These features help attract pollinators to the plants.

Question 7

What is the first step in the double fertilization process?

Answer 7

Pollen grain with two male gametes enters through micropyle

This initiates the fertilization process in flowering plants.

Question 8

What does the first male gamete fuse with during double fertilization?

Answer 8

Egg cell

This fusion creates a diploid zygote.

Question 9

What does the second male gamete fuse with during double fertilization?

Answer 9

Polar nuclei

This fusion creates a triploid endosperm.

Question 10

What structures develop in the embryo?

Answer 10

Cotyledons, plumule, epicotyl, radicle, hypocotyl

These structures are essential for the growth and development of the plant.

Question 11

Answer 11