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Exam 29: Plant Diversity I: How Plants Colonized Land

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Question 1

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The 2-m height attainable by Polytrichum moss is at the upper end of the size range reached by mosses. What accounts for the relative tallness of Polytrichum?

A) the cuticle that is found along the ridges of "leaves"
B) "leaves" that are more than one-cell-layer thick
C) high humidity of surrounding air provides support against gravity
D) reduced size, mass, and persistence of the sporophytes allows gametophores to grow taller
E) the presence of conducting tissues in "stem"

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Question 2

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This student has probably found a(n)

A) immature pine tree.
B) bryophyte sporophyte.
C) fern sporophyte.
D) horsetail gametophyte.
E) lycophyte sporophyte.

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Question 3

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On a field trip, a student in a marine biology class collects an organism that has differentiated organs, cell walls of cellulose, and chloroplasts with chlorophyll a. Based on this description, the organism could be a brown alga, a red alga, a green alga, a charophyte recently washed into the ocean from a freshwater or brackish water source, or a land plant washed into the ocean. The presence of which of the following features would definitively identify this organism as a land plant?

Which of the following is not evidence that charophytes are the closest algal relatives of plants?

Which taxon is essentially equivalent to the "embryophytes"?

The following are all True about the life cycle of mosses except

Which of the following is a land plant that produces flagellated sperm and has a sporophyte-dominated life cycle?

Whereas the zygotes of charophytes may remain within maternal tissues during their initial development, one should not expect to observe

The leaflike appendages of moss gametophytes may be one- to two-cell-layers thick. Consequently, which of these is least likely to be found associated with such appendages?

Which of the following is True of seedless vascular plants?

You are hiking in a forest and come upon a mysterious plant, which you determine is either a lycophyte sporophyte or a pterophyte sporophyte. Which of the following would be most helpful in helping you correctly classify the plant?

Which of the following is a True statement about plant reproduction?

Which of the following is not common to all phyla of vascular plants?

Suppose a moss evolved an efficient conducting system that could transport water and other materials as far as a tree is tall. Four of the following five statements about "trees" of such a species are correct. Select the exception.

Which of the following types of plants would not yet have been evolved in the forests that became coal deposits?

Assuming that they all belong to the same plant, arrange the following structures from smallest to largest. 1. antheridia 2) gametes 3) gametophytes 4 ) gametangia

In animal cells and in the meristem cells of land plants, the nuclear envelope disintegrates during mitosis. This disintegration does not occur in the cells of most protists and fungi. According to our current knowledge of plant evolution, which group of organisms should feature mitosis most similar to that of land plants?

Which of the following is a secondary compound of embryophytes?

Choose the adaptation below that best meets each particular challenge for life on land. -protection from predators

Which of the following was not a challenge for survival of the first land plants?