The sexual life cycle of plants is described as alternation of generations because it alternates between
A) reproductive plants and vegetative plants.
B) eggs and sperm.
C) flowers and spores.
D) male plants and female plants.
E) sporophytes and gametophytes.
E
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The most stable—that is, least reactive—form of carbon is:
A. ethanol. B. diamonds. C. glucose. D. pyruvate. E. carbon dioxide.
Which of the following are called bone-building cells and secrete the components of the matrix?
A. Red marrow B. Osteoblasts C. Osteocytes D. Osteoclasts E. Yellow marrow
If your pulse is 70 beats per minute, how fast is your heart beating?
A. 140 beats per minute B. 35 beats per minute C. 70 beats per minute D. 80 beats per minute E. 120 beats per minute
What kinds of evolutionary trends are represented by each of the two diagrams? The x-axis represents an ar-bitrary scale for a trait value, in this case nest diameter in a lineage of birds
a. A = active trend c. B = active trend b. A and B = active trend d. A and B = passive trend