Exam 29: Plant Diversity I: How Plants Colonized Land

At some time during their life cycles, bryophytes make ________.

Breeuwer et al. (2008) measured the effect of different temperature regimes on the growth of different Sphagnum species. The growth of S. fuscum at four temperatures is shown. Use the information in the graph to answer the following question. Based on the data shown, what additional conclusions can you draw?

Which of the following characteristics of plants is absent in their closest relatives, the charophyte algae?

Microphylls are found in which plant group?

The presence of vascular tissue allowed plants to ________.

Which of the following features of how seedless land plants get sperm to egg are the same as for some of their algal ancestors?

Assuming equal spore production rates, what is the likely consequence in a bryophyte with both asexual and sexual reproduction versus one with only sexual reproduction?

Which taxon is essentially equivalent to the "embryophytes"?

If the kingdom Plantae is someday expanded to include the charophytes (stoneworts), then the shared derived characteristics of the kingdom will include ________.

The most direct ancestors of land plants were probably ________.

A botanist discovers a new species of plant in a tropical rain forest. Investigation of its anatomy and life cycle shows the following characteristics: flagellated sperm, xylem with tracheids, separate gametophyte, and sporophyte generations with the sporophyte dominant, and no seeds. This plant is probably most closely related to ________.

Use the following description to answer the question. A biology student hiking in a forest happens upon an erect, 15-centimeter-tall plant that bears microphylls and a strobilus at its tallest point. When disturbed, the cone emits a dense cloud of brownish dust. A pocket magnifying glass reveals the dust to be composed of tiny spheres with a high oil content. This student has probably found a ________.

Use the following information to answer the question. Big Bend National Park in Texas is mostly Chihuahuan desert, where rainfall averages about 25 centimeters per year. Yet, it is not uncommon when hiking in this extremely arid zone to encounter mosses and ferns. One such plant is called "flower of stone." It is not a flowering plant, nor does it produce seeds. Under arid conditions, its leaflike structures curl up. However, when it rains, it unfurls its leaves, which form a bright green rosette on the desert floor. Consequently, it is sometimes called the "resurrection plant." At first glance, it could be a fern, a true moss, or a spike moss. Upon closer inspection of the leaves of "flower of stone," one can observe tiny, cone-like structures. Each cone-like structure emits spores of two different sizes. Further investigation also reveals that the roots of "flower of stone" branch only at the growing tip of the root, forming a Y-shaped structure. Consequently, which of the following is the closest living relative of "flower of stone"?

Most moss gametophytes do not have a cuticle and are 1-2 cells thick. What does this imply about moss gametophytes and their structure?

Which of the following is an accurate statement about plant reproduction?

What is an accurate statement about the genus Sphagnum?

Apical meristems ________.

Which set contains the most closely related terms?

Use the following information to answer the question. Big Bend National Park in Texas is mostly Chihuahuan desert, where rainfall averages about 25 centimeters per year. Yet, it is not uncommon when hiking in this extremely arid zone to encounter mosses and ferns. One such plant is called "flower of stone." It is not a flowering plant, nor does it produce seeds. Under arid conditions, its leaflike structures curl up. However, when it rains, it unfurls its leaves, which form a bright green rosette on the desert floor. Consequently, it is sometimes called the "resurrection plant." At first glance, it could be a fern, a true moss, or a spike moss. In which combination of locations would one who is searching for the gametophytes of "flower of stone" have the best chance of finding them?

The following question refers to the generalized life cycle for land plants shown in the figure. Each number within a circle or square represents a specific plant or plant part, and each number over an arrow represents meiosis, mitosis, or fertilization. In the figure, meiosis is most likely to be represented by which number(s)?