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15.3: Plant Evolution and Classification

Difficulty Level: At Grade Created by: CK-12

Chapter 15 Review Worksheet

Name___________________ Class______________ Date________

Multiple Choice

Circle the letter of the correct choice.

  1. Skunk cabbage has evolved stinky flowers because
    1. the smell prevents other plants from growing nearby all year long.
    2. all yellow flowers smell bad.
    3. the odor attracts pollinators.
    4. the odor repels pollinators.
  2. Which of the following is not a characteristic of most plants?
    1. carries out photosynthesis
    2. has cell walls made of cellulose
    3. has yellow flowers
    4. has specialized reproductive organs
  3. Much of the oxygen in the earth's atmosphere
    1. is produced as a waste product of cellular respiration in plants.
    2. is released as a byproduct of photosynthesis.
    3. is produced as a waste product of cellular respiration in animals.
    4. is produced by tree frogs.
  4. The mature sporophyte of a fern
    1. produces haploid spores by meiosis.
    2. produces diploid spores by meiosis.
    3. produces diploid spores by mitosis.
    4. produces haploid spores by mitosis.
  5. Fusion of male and female gametes in plants produces
    1. a eudicot stamen.
    2. a style.
    3. a haploid spore.
    4. a diploid embyro.
  6. Marine plants
    1. have always been the dominant organisms of the oceans.
    2. evolved after land plants.
    3. are restricted to the water closer to the air, so they can get sufficient light for photosynthesis.
    4. do not need to photosynthesize.
  7. The vascular tissue that transports water and minerals from the soil to the rest of the plant is the
    1. phloem.
    2. phlegm.
    3. leaf.
    4. xylem.
  8. The vascular tissue that transports sugars from photosynthetic tissues to the rest of the plant is
    1. phloem.
    2. phlegm.
    3. leaf.
    4. xylem.
  9. In most land plants, the ________ generation is the dominant one.
    1. diploid sporophyte
    2. diploid gametophyte
    3. haploid sporophyte
    4. haploid gametophyte
  10. In seed plants, the ________ helps transfer of sperm from the pollen grain to the egg.
    1. sepal
    2. petal
    3. tuberous ovule
    4. pollen tube
  11. The scales of pine cones are
    1. always green.
    2. modified roots.
    3. modified leaves.
    4. modified stems.
  12. Plants that make flowers are called
    1. gymnosperms.
    2. byrophytes.
    3. gametophytes.
    4. angiosperms.
  13. The class of plants that has vascular tissue and reproduces with spores is the
    1. clubmosses.
    2. liverworts.
    3. flowering plants.
    4. conifers.
  14. The embryonic stem in a seed is called the
    1. radicle.
    2. hypocotyl.
    3. seed coat.
    4. endosperm.
  15. Pollen contains
    1. male gametes.
    2. female gametes.
    3. fruits.
    4. a stigma.

True or False

Write true if the statement is true or false if the statement is false.

_______ 16. Plants are a direct or indirect source of food for most organisms living on earth.

_______ 17. A ripened ovary becomes a pollen grain.

_______ 18. Cross-pollination decreases genetic diversity.

_______ 19. Monocot embryos have one cotyledon.

_______ 20. Currently on earth, there are many more gymnosperm species than angiosperm species.

Fill in the Blanks

Fill in the blank with the term that best completes the sentence.

21. Switching between a haploid gametophyte stage and a diploid sporophyte stage is called ____________.

22. ____________ gives plant stems stiffness and helps protect plants against predators.

23. Nonvascular plants use ____________ for absorbing water.

24. Asexual reproduction from stems, leaves, or roots is called ____________.

25. ____________ occurs when a growing plant embryo bursts through the seed coat.

26. Liverworts, hornworts, and mosses are all ____________ plants.

27. Another name for vascular plants is ____________.

28. ____________ stores food in seed plants.

29. In a flower the ____________ contains the stigma, style, and ovary.

30. The ____________ protects the seed.

Short Answer

Answer each question in the space provided.

Refer to the figure below to answer questions 31 and 32.

(Xylem and phloem image is courtesy of Jesse Landy and under the Creative Commons license CC-BY-SA 3.0.)

31. What is the function of xylem vessels? How does their structure support their function?


32. What is the function of phloem vessels? How does their structure support their function?


33. How did plants and pollinators co-evolve? Describe a specific example.


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