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

Biology & Microbiology

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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

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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

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Activation energy is not required for nonspontaneous reactions

Indicate whether the statement is true or false.

Biology & Microbiology

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

Biology & Microbiology