Which of the following is not a stage of carcinogenesis?
A. promotion
B. differentiation
C. initiation
D. progression
E. angiogenesis
Answer: B
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The MONOPTEROUS gene in Arabidopsis encodes a protein that is similar in its function to which animal protein?
A) MyoD in frog embryos B) Bicoid in fruit-fly embryos C) keratin in human embryos
If pregnancy does not occur, then
A. chorionic gonadotropin levels increase. B. progesterone levels decrease and estrogen levels increase. C. both progesterone and estradiol levels increase. D. LH and FSH levels decrease. E. both progesterone and estradiol levels decrease.
Alcohol dehydrogenase converts alcohol into _____________________. Fill in the blank(s) with the appropriate word(s)
Mitochondria differ from chloroplasts in that mitochondria
A) convert light energy from the sun to chemical energy, whereas chloroplasts convert one form of chemical energy to another. B) contain three different membrane-bound compartments, whereas chloroplasts contain two. C) contain membrane folds called cristae, whereas chloroplasts contain disklike vesicles in stacks called grana. D) are not found in plants, whereas chloroplasts are not found in animals.