Exam 29: Plant Diversity I: How Plants Colonized Land

Retaining the zygote on the living gametophyte of land plants ________.

If humans had been present to build log structures during the Carboniferous period (they were not), which plant types would have been suitable sources of logs?

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 ________.

Bryophytes (non-vascular plants)________.

The evolution of a vascular system in plants allowed which of the following to occur?

You are hiking in a forest and come upon a mysterious plant, which you determine is either a lycophyte sporophyte or a monilophyte sporophyte. Which of the following would be most helpful in determining the correct classification of the plant?

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, which number represents an embryo?

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"?

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

You find a green organism in a pond near your house and believe it is a plant, not an alga. The mystery organism is most likely a plant and not an alga if it ________.

Which of these events, based on plant fossils, came last (most recently)?

Stomata ________.

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. Besides oil, what other chemical should be detected in substantial amounts upon chemical analysis of these small spheres?

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 ________.

Three of the following are evidence that charophytes are the closest algal relatives of plants. Select the exception.

Use the figure to answer the following question. Bowden showed that the presence of moss reduced nitrogen loss from soil. Which of the following questions would be the best follow-up study?

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. Which of the following characteristics is (are)possessed in common by true mosses, ferns, and spike mosses, and therefore becomes useless at helping to determine to which of these groups "flower of stone" belongs?

The coal and oil that we currently use as fuel sources ________.

Spores and seeds have basically the same function-dispersal-but are vastly different because spores ________.

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, which number represents the mature gametophyte?