1. A student has learned that a plant sporophyte has vascular tissue.
a. Do you expect the student to find vascular tissue in the moss sporophyte?
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b. How could you test that bryophytes are adapted to moist locations?
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c. Why would you expect any mutations in bryophytes to be tested immediately by the environment?
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d. Would diversification be promoted if the rudiments of vascular tissue evolved in bryophytes? Explain.
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2. Terrestrial organisms have similar adaptations.
a. Most terrestrial organisms protect the gametes and the embryo from dying out. Compare the reproductive adaptations of humans to that of trees.
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b. Most terrestrial organisms have a transport system. Compare the transport adaptations of a tree to that of humans.
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c. Many terrestrial organisms have an internal skeleton to oppose the force of gravity. Compare the skeletal adaptations of a tree to that of humans.
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d. In the temperate zone, humans remain active in the winter; deciduous trees do not. Explain.
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3. In reference to the life cycles (Figure 28.9):
a. The timing of what one element determines whether or not a diploid adult results?
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b. Hypothesize how the haplontic life cycle may have given rise to the alternation of generations life cycle.
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c. Hypothesize how the alternation of generations life cycle may have given rise to the diplontic life cycle.
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