Exam 26: The Colonization of Land by Plants and Fungi

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

Suppose that the cells of seed plants, like the skin cells of humans, produce a pigment upon increased exposure to UV radiation. Rank the following cells, from greatest to least, in terms of the likelihood of producing this pigment. 1. cells of sporangium 2) cells in the interior of a subterranean root 3) epidermal cells of sporophyte megaphylls 4) cells of a gametophyte

Which of the following should have had gene sequences most similar to the charophyte that was the common ancestor of the land plants?

If haustoria from the fungal partner were to appear within the photosynthetic partner of a lichen, and if the growth rate of the photosynthetic partner consequently slowed substantially, then this would support the claim that

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?

When a mycelium infiltrates an unexploited source of dead organic matter, what are most likely to appear within the food source soon thereafter?

Which of these paired fungal structures are structurally and functionally most alike?

Which of the following is most important in making the typical seed more resistant to adverse conditions than the typical spore?

Which of the following terms refers to symbiotic relationships that involve fungi living between the cells in plant leaves?

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 determining the correct classification of the plant?

You are hiking in a forest and happen upon a plant featuring a central stemlike structure from which sprout many, tiny, leaflike structures. Which of the following would be the most certain means of distinguishing whether it was a true moss or a club moss?

Which process occurs in fungi and has the opposite effect on a cell's chromosome number than does meiosis I?

Generally, wind pollination is most likely to be found in seed plants that grow

All of the following cellular structures are functionally important in cells of the gametophytes of both angiosperms and gymnosperms except

The following questions refer to the generalized life cycle for land plants shown in Figure 26.1. Each number within a circle or square represents a specific plant or plant part, and each number over an arrow represents either meiosis, mitosis, or fertilization. Figure 26.1 -Which number represents a megaspore mother cell in Figure 26.1?

Which of the following characteristics helped seedless plants better adapt to life on land?

The following questions refer to the generalized life cycle for land plants shown in Figure 26.1. Each number within a circle or square represents a specific plant or plant part, and each number over an arrow represents either meiosis, mitosis, or fertilization. Figure 26.1 -In Figure 26.1, which number represents an embryo?

Among the organisms listed here, which are thought to be the closest relatives of fungi?

Within a gymnosperm megasporangium, what is the correct sequence in which the following should appear during development, assuming that fertilization occurs? 1. sporophyte embryo 2) female gametophyte 3) egg cell 4) megaspore

Angiosperms are the most successful terrestrial plants. Which of the following features is unique to them and helps account for their success?