Exam 26: The Colonization of Land by Plants and Fungi

Please use the following information to answer the question(s) below. Big Bend National Park in Texas is mostly Chihuahuan desert where rainfall averages about 10 inches per year. Yet when hiking in this bone-dry desert it is not uncommon 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." -In which combination of locations would one who is searching for the gametophytes of flower of stone have the best chance of finding them? 1) moist soil 2) underground, nourished there by symbiotic fungi 3) permanently shady places 4) far from any flower of stone sporophytes

A botanist discovers a new species of plant in a tropical rain forest. After observing its anatomy and life cycle, he notes 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

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 will occur?

Arrange the following structures, which can be found on male pine trees, from the largest structure to the smallest structure (or from most inclusive to least inclusive). 1) sporophyte 2) microspores 3) microsporangia 4) pollen cone 5) pollen nuclei

Which of the following cellular structures is functionally important in cells of the gametophytes of both angiosperms and gymnosperms?

Please use the following information to answer the question(s) below. Diploid nuclei of the ascomycete Neurospora crassa contain 14 chromosomes. A single diploid cell in an ascus will undergo one round of meiosis, followed in each of the daughter cells by one round of mitosis, producing a total of eight ascospores. -If a single, diploid G2 nucleus in an ascus contains 400 nanograms (ng) of DNA, then a single ascospore nucleus of this species should contain how much DNA (ng), carried on how many chromosomes?