Which organ system does NOT play a role in acquiring materials and energy?
A. digestive
B. skeletal
C. muscular
D. cardiovascular
Answer: D
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Endosperm is a major part of monocot seeds. In most eudicots, _____
A) the same thing is true; there is a substantial amount of endosperm B) endosperm never even starts to form after double fertilization C) endosperm nutrients are repackaged into the cotyledons D) endosperm replaces cotyledons in the seed
Sexual reproduction requires the cellular process of ______ followed by _________.
A. mitosis ... gamete formation B. mitosis ... fertilization C. mitosis ... meiosis D. meiosis ... fertilization
The structural combination of DNA and protein forms ribosomes.
a. true b. false
Which of the following membrane lipids does not contain a fatty acid tail?
(a) phosphatidylcholine (b) a glycolipid (c) phosphatidylserine (d) cholesterol