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

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

Orchid bees are to Brazil nut trees as ________ are to pine trees.

What adaptations should one expect of the seed coats of angiosperm species whose seeds are dispersed by frugivorous (fruit-eating)animals, as opposed to angiosperm species whose seeds are dispersed by other means? 1)The exterior of the seed coat should have barbs or hooks. 2)The seed coat should contain secondary compounds that irritate the lining of the animal's mouth. 3)The seed coat should be able to withstand low pH's. 4)The seed coat, upon its complete digestion, should provide vitamins or nutrients to animals. 5)The seed coat should be resistant to the animals' digestive enzymes.

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 megasporangium nucleus?

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

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

The next few questions refer to the following description. Match the animal features with the appropriate angiosperm analog. 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 internal fertilization that occurs prior to shell deposition is what type of angiosperm analog?

Angiosperm double fertilization is so-called because it features the formation of

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

The next few questions refer to the following description. The cycads, a mostly tropical phylum of gymnosperms, evolved about 300 million years ago and were dominant forms during the Age of the Dinosaurs. Though their sperm are flagellated, their ovules are pollinated by beetles. These beetles get nutrition (they eat pollen) and shelter from the microsporophylls. Upon visiting megasporophylls, the beetles transfer pollen to the exposed ovules. In cycads, pollen cones and seed cones are borne on different plants. Cycads synthesize neurotoxins, especially in the seeds, that are effective against most animals, including humans. -If the beetles survive by consuming cycad pollen, then whether the beetles should be considered mutualists with, or parasites of, the cycads depends upon

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 -Meiosis is most likely to be represented by which number(s)in Figure 30.1?

The fruit of the mistletoe, a parasitic angiosperm, is a one-seeded berry. In members of the genus Viscum, the outside of the seed is viscous (sticky), which permits the seed to adhere to surfaces, such as the branches of host plants or the beaks of birds. What should be expected of the fruit if the viscosity of Viscum seeds is primarily an adaptation for dispersal rather than an adaptation for infecting host plant tissues?

Generally, wind pollination is most likely to be found in seed plants that grow

If a female orchid bee has just left a Brazil nut tree with nectar in her stomach, and if she visits only other flowers on the same tree, the result should be

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, which number represents the mature gametophyte?

The next few questions refer to the following description. The cycads, a mostly tropical phylum of gymnosperms, evolved about 300 million years ago and were dominant forms during the Age of the Dinosaurs. Though their sperm are flagellated, their ovules are pollinated by beetles. These beetles get nutrition (they eat pollen) and shelter from the microsporophylls. Upon visiting megasporophylls, the beetles transfer pollen to the exposed ovules. In cycads, pollen cones and seed cones are borne on different plants. Cycads synthesize neurotoxins, especially in the seeds, that are effective against most animals, including humans. -Which feature of cycads distinguishes them from most other gymnosperms? 1)They have exposed ovules. 2)They have flagellated sperm. 3)They are pollinated by animals.

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

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

Which of the following is a characteristic of all 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. -From reading their biology textbook, what would Harold and Kumar discover?