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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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An animal pollinator may be rewarded by _______ when it visits a flower of a coevolved plant (choose all that apply).

  1. a. pollen
  2. b. nectar
  3. c. hormones
  4. d. fruit

Summary Introduction

Introduction: Pollination is necessary for the sexual reproduction. The transfer of pollen from a male part to the female part of a plant allows the fertilization to occur and later develops into a seed. Pollination takes place with the help of pollinating agents, such as by wind or animal. The pollen, nectar and other rewards are used by the plants to attract the pollinators.

Explanation

Reason for the correct answer:

In the flowering plants, pollination involves the arrival of the pollen grains on a receptive stigma. The environmental agents or animals are the pollination vectors which help to transfer the pollen from anther to stigma. Pollinators are the animal pollination vectors. Some of the flower traits and fragrance can attract the coevolved pollinators. The pollen and nectar are used by the plants to attract the pollinators.

Option a. is given as “pollen”.

The sperm cell of the plant called the pollen is produced by the anther, the male reproductive part. It is used in pollination for the transfer of the male gamete from the anther to stigma.  It is used to attract the animal pollinators of poppies, roses and other flowers which do not produce any nectar.

Hence, option a. is correct.

Option b. is given as “nectar”.

The nectar is the sweet fluid that is produced by the flowers. It is rewarded by the plants to attract many animal pollinators. Nectars are produced by a gland in flowers called the nectarines...

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