The antibiotic penicillin inhibits the ability of bacteria to:
A) copy DNA. B) synthesize protein.
C) make cell walls. D) undergo respiration.
Answer: C
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In combination, the products of gap genes, pair-rule genes, and segmentation polarity genes _____
A) trigger the reorganization of the larval body into an adult body B) define the segmented body plan of the embryo C) set up the back-to-belly axis of the larval body D) direct cell movements during differentiation
Poison ivy reacts to low sunlight by
a. developing additional roots. b. flowering more often. c. increasing leaf size. d. increasing stem growth.
Which of the following events occurs last in an action potential?
a. Opening of voltage-gated Na+ channels b. Closing of voltage-gated Na+ channels c. Opening of voltage-gated K+ channels d. Closing of voltage-gated K+ channels
Compared with modern humans, Neanderthals had all the following features except:
A. Tall, thin body B. Stockier build C. Thicker bones D. Bulkier muscles E. Shorter stature