Chapter 12. 12·8–12·10 Flowering plants are the most diverse and successful plants.

Show What You Know - Self Quiz

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You must read each slide, and complete any questions on the slide, in sequence.

Instructions

Check your understanding of concepts from 12·8–12·10 Flowering plants are the most diverse and successful plants by answering the following questions.

1.

1. Currently the _____ are the dominant form of plants.

gymnosperms

angiosperms

nontracheophytes

seedless tracheophytes

bryophytes

Correct. (See section 12·8 Angiosperms are the dominant plants today.)

Incorrect. (See section 12·8 Angiosperms are the dominant plants today.)

2.

2. Which of the following is NOT a method used in the wild by angiosperms to attract animal pollinators to their flowers?

Some flowers, such as the skunk cabbage, produce heat to attract insect pollinators.

The carrion flowers of South Africa have petals that attract flies because they look like rotting flesh.

The color of the flower petals attracts certain animals; many birds are attracted to the color red.

Because bees are able to sense ultraviolet light, some flowers have marking on them that are only visible under ultraviolet wavelengths.

All of the above are methods that angiosperms use to attract animal pollinators.

Correct. (See section 12·9 A flower is nothing without a pollinator.)

Incorrect. (See section 12·9 A flower is nothing without a pollinator.)

3.

3. Scientists have named approximately 300,000 species of beetles and 15,000 species of ferns. Approximately how many species of flowering plants have been named?

1,000,000

450,000

225,000

300,000

55,000

Correct. (See section 12·8 Angiosperms are the dominant plants today.)

Incorrect. (See section 12·8 Angiosperms are the dominant plants today.)

4.

4. Angiosperms and gymnosperms differ from each other in that:

angiosperms have a single fertilization process while gymnosperms use double fertilization.

angiosperms tend to rely on animal pollinators while gymnosperms tend to rely on wind pollination.

angiosperms have roots and stems while gymnosperms do not.

angiosperms have spores while gymnosperms do not.

angiosperms use pollen while gymnosperms use cones.

Correct. (See section 12·9 A flower is nothing without a pollinator.)

Incorrect. (See section 12·9 A flower is nothing without a pollinator.)

5.

5. Double fertilization in angiosperms provides several advantages over reproduction in gymnosperms. One of these is:

double fertilization initiates the formation of endosperm before an egg is fertilized, where gymnosperms use hundreds of haploid female cells to make the endosperm only after fertilization occurs.

double fertilization initiates the formation of endosperm only when an egg is fertilized, where gymnosperms use hundreds of haploid female cells to make the endosperm before fertilization occurs.

double fertilization allows for a higher degree of inbreeding in angiosperms than is available in gymnosperms.

double fertilization allows angiosperms to avoid the genetically less diverse haploid stage that gymnosperms must go through.

double fertilization produces twice as many seeds in angiosperms as single fertilization does in gymnosperms.

Correct. (See section 12·10 Angiosperms improve seeds with double fertilization.)

Incorrect. (See section 12·10 Angiosperms improve seeds with double fertilization.)

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