Exam 30: Plant Diversity II: The Evolution of Seed Plants

The following questions refer to the generalized life cycle for land plants shown in Figure 30.1. 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 30.1 -Which number represents a megaspore mother cell in Figure 30.1?

Arrange the following in the correct sequence, from earliest to most recent, in which these plant traits originated. 1)sporophyte dominance, gametophyte independence 2)sporophyte dominance, gametophyte dependence 3)gametophyte dominance, sporophyte dependence

Over human history, which process has been most important in improving the features of plants that have long been used by humans as staple foods?

A fruit is most commonly

Which structure(s)must pass through the micropyle for successful fertilization to occur in angiosperms?

Harold and Kumar are pre-med and pre-pharmacy students, respectively. They complain to their biology professor that they should not have to study about plants because plants have little relevance to their chosen professions. -Kumar, especially, might be well advised to learn more about

In addition to seeds, which of the following characteristics are unique to the seed-producing plants?

Gymnosperms differ from both extinct and extant (living)ferns because they

A researcher has developed two stains for use with seed plants. One stains sporophyte tissue blue; the other stains gametophyte tissue red. If the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur?

Which of the following sex and generation combinations most directly produces the megasporangium of pine ovules?

Ecologists often build models to depict the relationships between organisms. In such models, an arrow is used to link two organisms in a relationship. The arrowhead is next to the organism that is affected. If the effect is positive, the arrow is labeled with (+), and if negative, then the label is (-). Capuchin monkeys have been known to use rocks to smash open the fruits of Brazil nut trees. On the rare occasions this has been observed, the monkeys consume all of the Brazil nuts. Thus, which of the following correctly depicts the relationship between capuchin monkeys and Brazil nut trees?

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

What is the greatest threat to plant diversity?

Ecologists often build models to depict the relationships between organisms. In such models, an arrow is used to link two organisms in a relationship. The arrowhead is next to the organism that is affected. If the effect is positive, the arrow is labeled with (+), and if negative, then the label is (-). Which of the following models best illustrates the relationship of the Brazil nut tree and the other organisms associated with it?

Which of the following statements is true of the pine life cycle?

In onions (Allium), cells of the sporophyte have 16 chromosomes within each nucleus. Match the number of chromosomes present in each of the following onion tissues. -How many chromosomes should be in a generative cell nucleus?

The cutting and burning of tropical rain forests leads to which of the following? 1)addition of CO₂ to the atmosphere 2)decreased removal of CO₂ from the atmosphere 3)greenhouse effect 4)global warming 5)decreasing sea level

In the long run, harvesting Brazil nut trees for their lumber is most likely to benefit

The following questions refer to the generalized life cycle for land plants shown in Figure 30.1. 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 30.1 -In Figure 30.1, the process labeled "6" involves

Reptilian embryos are protected from desiccation by a leathery shell. Similarly, which pair of structures protects seed plants' embryos and male gametophytes, respectively, from desiccation?