Both honeybees and birds have wings for flight; thus, these structures are homologous in the
two animal groups.
a. true, because the wings have a similar function and thus must be anatomically similar
b. false, because the wings look very different between the two groups
c. true, because all animals have a common ancestor
d. false, because birds and honeybees do not share a common ancestor from which this trait
was derived
D
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Which of the following statements concerning cyclin-dependent kinases (CDKs) is NOT true?
A. CDKs are enzymes that attach phosphate groups to other proteins. B. CDKs are active, or "turned on," when complexed with cyclins. C. CDKs are present throughout the cell cycle. D. CDKs are inactive, or "turned off," in the presence of cyclins.
Answer the question using the accompanying figure.Which number identifies the structure that transmits auditory
signals to the brain?
a. 2 b. 6 c. 7 d. 8 e. 9
A mature ovule includes the embryo sporophyte, its reserves of food, and the seed coat. This is collectively called:
a. a fruit b. a seed c. a spore d. the endosperm e. an ovary
Mitochondrial gene defects most often affect the ____________________ and the ____________________. Fill in the blank(s) with the appropriate word(s)