Transcription factors account for a greater proportion of the proteome in a fetus compared to a 20-year-old because
A) many cells have already died in a 20-year-old.
B) a fetus does not yet need many of its proteins.
C) cells are actively differentiating, and many structures are forming in a fetus.
D) an adult can carry out more activities than can a fetus.
C) cells are actively differentiating, and many structures are forming in a fetus.
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Some forms of methylmalonic acidemia can be ____
a. caused by ethylene glycol exposure b. caused by tainted baby formula c. caused by type O blood transfusions d. cured if the condition is detected early in life e. treated successfully if the condition is detected early in life
Sensitivity to allergens
a. may be triggered by stress. b. may be triggered by changes in air temperature. c. may be due to genetic predisposition. d. may be triggered by a and b only. e. may be due to genetic predisposition, and may be triggered by stress and by changes in air temperature.
How would decreasing the amount of raw material and keeping all other factors the same affect the human population?
A. It would increase the average life span of the human population. B. It would increase overpopulation. C. The problem of hunger would be decreased. D. Human carrying capacity would be decreased.
Humans belong to all of the following groups EXCEPT ______.
a) chordates b) mammals c) eutherians d) tetrapods e) humans belong to all these groups