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

The harpy eagle, Harpia harpyja, is the largest, most powerful raptor in the Americas. It nests only in trees taller than 25 metres. It is a "sloth specialist," but will also take agouti. Thus, if these eagles capture too many agoutis from a particular locale, they might contribute to their own demise by

The following questions refer to the description below. Biologists are studying pollination of one species of alpine flower in the Canadian Rocky Mountains. In late spring and early summer, they find that the majority of flowers are deep red and deep pink. Toward the end of summer, the most common colours are white and very pale pink. -In order to complete their pollination study, the biologists had to

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

As tropical rainforests and other ecosystems are destroyed, people are realizing all of the following, except that

Which of the following can be found in gymnosperms?

Many mammals have skins and mucous membranes that are sensitive to phenolic secretions of plants like poison oak (Rhus). These secondary compounds are primarily adaptations that

Which of the following is not a characteristic that distinguishes gymnosperms and angiosperms from other plants?

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. -Animals that consume Brazil nuts are deriving nutrition mostly from tissue whose nuclei have how many chromosomes?

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

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 dispersal and/or nurture of young after hatching from the egg is what type of angiosperm analogue?

Carpels and stamens are

Suppose that the cells of seed plants, like the skin cells of humans, produce a pigment upon increased exposure to UV radiation. Rank the following cells, from greatest to least, in terms of the likelihood of producing this pigment. 1. cells of sporangium 2. cells in the interior of a subterranean root 3. epidermal cells of sporophyte megaphylls 4. cells of a gametophyte

Use the following information to answer the questions below. The following questions refer to the generalized life cycle for land plants shown in the figure below. 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. -In the figure above, which number represents an embryo?

How have fruits contributed to the success of angiosperms?

Arrange the following structures from largest to smallest, assuming that they belong to two generations of the same angiosperm. 1. ovary 2. ovule 3. egg 4. carpel 5. embryo sac

To help ensure a prosperous future for the largest number of people, developed countries should

Use the following information to answer the questions below. 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

If a female orchid bee has just left a Brazil nut tree with nectar in her stomach, and if she visits another flower on a different Brazil nut tree, what is the sequence in which the following events should occur? 1. double fertilization 2. pollen tube emerges from pollen grain 3. pollen tube enters micropyle 4. pollination

On the Pacific island of Guam, large herbivorous bats called "flying foxes" commonly feed on cycad seeds, a potent source of neurotoxins. The flying foxes do not visit male cones. Consequently, what should be true?

Domesticated honeybees are one of the most important insect pollinators for domestic and global food production. Which cause is not attributed to the large losses of honeybee colonies?