Studies of a soybean plant (Glycine max) and the bacterium Bradyrhizobium japonicum have shown that the tip of a
root hair curls toward the bacterium in response to ____.
a. a flavonoid released by soybean roots
b. nod gene products produced by soybean roots
c. nod gene products produced by the bacterium
d. nitrogen fixation by the bacterium
e. a flavonoid produced by the bacterium
ANSWER: c
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Living members of the ____ lineage include the sharks, skates, and rays, all of which have skeletons made entirely of
cartilage.
a. Petromyzontoidea b. Chondrichthyes c. Actinopterygii d. Myxinoidea e. Sarcopterygii
Sterol regulatory element binding proteins (SREBPs) are involved in regulating the synthesis of ____
a. proteins b. lipids c. nucleic acids d. carbohydrates e. amino acids
Activation energy is not required for nonspontaneous reactions
Indicate whether the statement is true or false.
Which STD causes warts on the genitals and can lead to cervical and anal cancers?
a. gonorrhea b. syphilis c. chlamydia d. genital herpes e. HPV infection