Epithelial tissue covers or lines body surfaces or cavities.
a. true
b. false
Answer: a. true
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Scientists isolate cells in various phases of the cell cycle. They find a group of cells that have times more DNA than G1 phase cells. The cells of this group are _____
A) between the G1 and S phases in the cell cycle B) in the G2 phase of the cell cycle C) in the M phase of the cell cycle D) in the S phase of the cell cycle
Seed plants are pollinated by:
A. butterflies B. birds C. bats D. beetles E. all of the other choices provided
Because of their structure, trans fats resemble ________ fatty acids in shape and are produced artificially during the manufacture of shortening and margarine
Fill in the blank with correct word.
Many fern gametophytes are hermaphrodites, meaning they can produce both sperm and egg. Why is this necessary for a fern, but not for an angiosperm?
A. If one seed colonizes a new habitat, reproduction can occur in later stages. B. The gametophyte can produce multiple types of spores. C. The gametophyte can produce multiple types of seeds. D. If one spore colonizes a new habitat, reproduction can occur in later stages. E. Angiosperm gametes are diploid.