Which of the following lists three processes or events that add carbon dioxide to the atmosphere?
a) cellular respiration, volcanic eruptions, and forest fires
b) cellular respiration, photosynthesis, and volcanic eruptions
c) denitrification, photosynthesis, and erosion
d) forest fires, volcanic eruptions, and forest fires
Ans: a) cellular respiration, volcanic eruptions, and forest fires
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Enhanced phagocytosis of antibody-sensitized cells is known as
A) complementation. B) immunization. C) opsonization. D) tolerance.
Which is the temporary blood vessel that shunts most blood past the fetal liver?
A) ductus arteriosus B) aorta C) foramen ovale D) ductus venosus
Which of the following is notan example of a regulatory DNA site?
A. enhancer B. insulator C. repressor D. operator
What is an advantage of sexual reproduction over asexual reproduction?
a)genetic variability during an ecological disaster b)genetic variability when the environment is stable c)faster reproduction d)requirement of less energy e)simpler form of reproduction