Bone mass increases in humans until about age
__________ because __________ after that time.
a. 18; osteoclast activity commences
b. 13; osteoblast activity slows
c. 24; osteoblast activity slows
d. 24; osteocytes no longer function
e. 18; osteocytes are no longer formed
Answer: c
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A. blood B. brain C. lymph glands D. liver E. spleen
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a. brown algae b. red algae c. green algae d. bryophytes e. seedless vascular plants
Which dissolved gas cannot be transported by hemoglobin?
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