Which of the following are the most abundant cells in adult bones?
A. Osteocytes
B. Osteoblasts
C. Red marrow
D. Osteoclasts
E. Yellow marrow
Answer: A
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The ____ in mammals allows water to exit but does not allow ions or urea to exit
a. distal convoluted tubule b. Bowman's capsule c. descending segment of the loop of Henle d. proximal convoluted tubule e. ascending segment of the loop of Henle
Cleavage produces the
a. zygote. b. blastula. c. gastrula. d. puff. e. third germ layer.
The individual cars of a freight train could be used to describe:A
the structure of a cestode. B. the structure of a mollusk. C. the structure of a gastropod. D. the structure of a chiton. E. the structure of a nemertean
Which of the following is a true statement?
a. Flowers may have secondary growth. b. Secondary growth is a common feature of eudicot leaves. c. Secondary growth is produced by both the vascular cambium and the cork cambium. d. Primary growth and secondary growth alternate in the life cycle of a plant. e. Plants with secondary growth are typically the smallest ones in an ecosystem.