chapter 30 quiz questions

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.

2 & 3

cycads feature that makes them similar to many angiosperms

3 only

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

alteration of generations

How have fruits contributed to the success of angiosperms?

by facilitating the dispersal of seeds

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

chloroplasts

Gymnosperms differ from both extinct and extant (living) ferns because they a) are woody. b) have macrophylls. e) have spores. d) have pollen. e) have sporophylls.

d) have pollen

Which of the following is a characteristic of all angiosperms?

double internal ferilization

Angiosperms are the most successful terrestrial plants. Which of the following features is unique to them and helps account for their success?

fruit enclosed seeds

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

inhibit inherbivtory

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

integument spropollenin

Carpels and stamens are

modified sporophylls

difference between angiosperms and gymnosperms

only angiosperms produce fruit

Gymnosperms and angiosperms have the following in common except

ovaries

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

ovary

structure common to both angiosperms and gymnosperms

ovule

which of the following flower parts develop into a seed

ovule

which of the following can be found in gymnosperms

pollen

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?

red interiors and blue exteriors

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

theyre modified leaves