18.1–18.3: Plants can reproduce sexually and asexually.
Most plants have two very different options for reproduction: asexual and sexual reproduction.
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Question 18.20
Each angiosperm pollen grain contains how many sperm cells?
- a) two
- b) one
- c) millions
- d) thousands
- e) hundreds
Question 18.21
Mosses and ferns differ in their reproductive strategies from gymnosperms and angiosperms in which of the following ways?
- a) Mosses and ferns have much larger seeds than do angiosperms and gymnosperms.
- b) Mosses and ferns use wind pollination, whereas angiosperms and gymnosperms use insects for pollination.
- c) Mosses and ferns are primarily diploid in their adult (reproductive) form, whereas gymnosperms and angiosperms are primarily haploid.
- d) Mosses and ferns are primarily haploid in their adult form, whereas gymnosperms and angiosperms are primarily diploid.
- e) Mosses and ferns rely on liquid water for fertilization, whereas angiosperms and gymnosperms do not need liquid water for fertilization.
Question 18.22
The common term for the action of transferring pollen grains from an anther onto a stigma is:
- a) pollination.
- b) reproduction.
- c) fertilization.
- d) intercourse.
- e) None of the above are correct.
Question 18.23
Flowering plants attract animals to assist in pollination. Which of the following animal groups is not a common pollinator of flowering plants?
- a) bats
- b) bumblebees
- c) moths
- d) beetles
- e) All of the above are common pollinators of flowering plants.
