Arteries carry ____
a. blood toward the heart
b. blood away from the heart
c. only oxygen-rich blood
d. only oxygen-poor blood
e. a combination of more than one of these
ANSWER: b
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During phase "3" in the figure above, the population growth slows and then levels off because ____
a. population growth becomes exponential b. resources are virtually unlimited c. density dependent factors stop playing an important role d. density independent factors become operational e. the carrying capacity has been reached
Four of the five structures listed below are related by
a common gender. Select the exception. a. micropyle b. integument c. embryo sac d. microspore e. egg
ATP is important in living organisms because:a
like all other nucleic acids, it stores hereditary information. b. like RNA, it acts as a source code for the formation of proteins. c. it can transfer some of its energy to other chemicals. d. it is an important structural component of cell membranes. e. it is easily converted to starch for long-term storage.
Fungi differ from bacteria in that fungi
a. Have cell walls. b. Have DNA. c. Have a nucleus. d. Spoil food. e. Are cellular.