Once a hormone activates the enzyme adenylyl cyclase, ATP is converted to cAMP, which in turn:a
activates protein kinase.
b. inhibits phosphodiesterase.
c. initiates more cAMP production.
d. initiates protein synthesis.
e. inhibits protein synthesis.
A
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Which of the following is true of the life cycle of mosses?
A) The haploid generation grows on the sporophyte generation. B) Spores are primarily distributed by water currents. C) Antheridia and archegonia are produced by gametophytes. D) The sporophyte generation is dominant. E) The growing embryo gives rise to the gametophyte.
Which of the choices gives the correct sequence of early embryonic development in Drosophila?
A) zygote, syncytial blastoderm, multinucleate syncytium, cellular blastoderm B) zygote, cellular blastoderm, syncytial blastoderm, multinucleate syncytium C) zygote, multinucleate syncytium, syncytial blastoderm, cellular blastoderm D) syncytial blastoderm, multinucleate syncytium, zygote, cellular blastoderm
Which of the following statements is false?
a. Digestion of a meal begins in the mouth. b. Hydrolysis of proteins begins in the stomach. c. Most hydrolysis of fats takes place in the stomach. d. Absorption of amino acids takes place in the small intestine. e. Absorption of water takes place in the large intestine.
________ is characterized by unusually warm ocean temperatures in the eastern Pacific.
Fill in the blank(s) with the appropriate word(s).