Exam 30: Plant Diversity Ii: the Evolution of Seed Plants

Hypothetically, one of the major benefits of double fertilization in angiosperms is to

The agouti is most directly involved with the Brazil nut tree's dispersal of

Use the following information to answer the questions below. 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 an embryo nucleus?

Which of the following structures is incorrectly matched with function in the life cycle of an angiosperm?

People who attempted to plant Brazil nuts in hopes of establishing plantations of Brazil nut trees played roles most similar to those of

All of the following cellular structures are functionally important in cells of the gametophytes of both angiosperms and gymnosperms except

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

The same bees that pollinate the flowers of the Brazil nut trees pollinate orchids, which are epiphytes (in other words, plants that grow on other plants); however, orchids cannot grow on Brazil nut trees. These observations explain

Native peoples traditionally use Brazil nuts to treat stomach ache, inflammation, hypersensitivity, and hepatitis. Consequently, a scientist should be interested in promoting

Which of the following flower parts develops into the pulp of a fleshy fruit?

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?

The next few questions refer to the following description. Match the animal features with the appropriate angiosperm analogue. Oviparous (egg-laying) animals have internal fertilization (sperm cells encounter eggs within the female's body). Yolk and/or albumen is (are) provided to the embryo, and a shell is then deposited around the embryo and its food source. Eggs are subsequently deposited in an environment that promotes their further development, or are incubated by one or both parents. -The yolk and/or albumen of an animal egg is what type of angiosperm analogue?

Among plants known as legumes (beans, peas, alfalfa, clover, etc.), the seeds are contained in a fruit that is itself called a legume, better known as a pod. Upon opening such pods, it is commonly observed that some ovules have become mature seeds, whereas other ovules have not. Thus, which of the following statements is (are)true? 1. The flowers that gave rise to such pods were not pollinated. 2. Pollen tubes did not enter all of the ovules in such pods. 3. There was apparently not enough endosperm to distribute to all of the ovules in such pods. 4. The ovules that failed to develop into seeds were derived from sterile floral parts. 5. Fruit can develop, even if all ovules within have not been fertilized.

A gymnosperm seed consists of a

If the beetles survive by consuming cycad pollen, then whether the beetles should be considered mutualists with, or parasites of, the cycads depends upon

Use the following information to answer the questions below. The Brazil nut tree, Bertholletia excels (n = 17), is native to tropical rain forests of South America. It is a hardwood tree that can grow to over 50 metres, is a source of high-quality lumber, and is a favourite nesting site for harpy eagles. As the rainy season ends, tough-walled fruits, each containing 8-25 seeds (Brazil nuts), fall to the forest floor. About $50 million worth of nuts are harvested each year. Scientists have discovered that the pale yellow, self-incompatible flowers of Brazil nut trees admit only female orchid bees as pollinators. -The agouti (Dasyprocta spp.), a cat-sized rodent, is the only animal with teeth strong enough to crack the hard wall of Brazil nut fruits. It typically eats some of the seeds, buries others, and leaves still others behind inside the fruit, which moisture can now enter. The uneaten seeds may subsequently germinate. Consequently, which terms describe the relationship between the Brazil nut tree and the agouti? 1. parasitic 2. commensalistic 3. symbiotic 4. endosymbiotic 5. mutualistic

A botanist was visiting a tropical region for the purpose of discovering plants with medicinal properties. All of the following might be ways of identifying potentially useful plants except

What is true of stamens, sepals, petals, carpels, and pinecone scales?

Which group is noted for the independence of gametophyte and sporophyte generations from each other?

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