Exam 29: Nonvascular and Seedless Vascular Plants

The following question refers to the generalized life cycle for 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?

Two small, poorly drained lakes lie close to each other in a northern forest. The basins of both lakes are composed of the same geologic substratum. One lake is surrounded by a dense Sphagnum mat; the other is not. Compared to the pond with Sphagnum, the pond lacking the moss mat most likely has ________.

The following question refers to the generalized life cycle for 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. Which number represents a megaspore mother cell in the figure?

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?

Which of the following describes a difference between the structures of spores and seeds?

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

Use the following information to answer the question. Big Bend National Park in Texas is mostly 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. What feature of both true mosses and ferns makes it most surprising that they can survive for many generations in dry deserts?

Use the following information to answer the question. Big Bend National Park in Texas is mostly 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. Which of the following features is most important for true mosses and ferns to reproduce in the desert?

Which of the following could occur after plants moved from the oceans to land?

Which of the following claims about moss gametophytes is most consistent with the observation that they lack a cuticle and are 1-2 cells thick?

Which of these structures produce spores?

Assuming that they all belong to the same plant, which of the following lists the structures from largest to smallest?

A student encounters a pondweed that appears to be a charophyte. Which of the following features would best help the student determine whether the sample comes from a charophyte or from some other type of green alga?

In plants, which of the following is a benefit of retaining the zygote on the living gametophyte?

In which of the following structures of a plant are apical meristems found?

Which of the following statements is accurate with regard to the life cycle of mosses?

Which of the following is an accurate statement about the genus Sphagnum?

What evidence do paleobotanists look for that indicates the movement of plants from water to land?

The following question refers to the generalized life cycle for 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?

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 characteristics would be most helpful in determining the correct classification of the plant?