Chapter 23, Problem 19A

Summary Introduction

Introduction :

Pollination occurs when a pollen grain of a species comes in contact to the female reproductive structure of a very same species. A pollen grain is a male gametophyte that comprises of four cells and is produced from a microspore. After pollination, fertilization occurs and seed forms.

Answer to Problem 19A

Correct answer :

The correct answer is option (C) large amounts of pollen.

Explanation of Solution

Explanation/justification for the correct answer :

Option (C) large amounts of pollen. Wind-pollinated flowers produce huge amounts of light weighted pollen. This helps them to land on the stigma of a flower of the same species. So, the correct answer is option (C).

Explanation for incorrect answer :

Option (A) small amounts of pollen. Wind-pollinated flowers produce huge amounts of light weighted pollen for pollination. The stamens of these flowers are hanged below the petals to exposing then to the wind. So, this is an incorrect option.

Option (B) larger pollen grains. In wind-pollinated flowers the pollen grains are light weighted and large in quantities. They do not have large pollen grains. So, this is an incorrect answer.

Option (D) large quantities of nectar. Normally, animal-pollinated flowers have large quantities of nectar. Animals are attracted by the nectar of the flowers. Wind-pollinated flowers have no nectar. So, this is an incorrect answer.