To prepare flight muscles for use on a cool morning, hawkmoths _____
A) relax the muscles completely until after they launch themselves into the air
B) decrease their standard metabolic rate
C) rapidly contract and relax these muscles to generate metabolic warmth
D) reduce the metabolic rate of the muscles to rest them before flight
C
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What are attached at the centromere?
A. Daughter cells B. Genomes C. Sister chromatids D. Homologous chromosomes
Examine Figure 23.21 in your text. According to the figure, a mass extinction has occurred at approximately the end of the:
A. Ordovician. B. Devonian. C. Permian. D. Triassic. E. All of the above.
People in developed nations use enormous quantities of resources. Extracting and using these resources does irreparable harm to the planet. What are some things that individuals can do to reduce their impact on the planet and live sustainably?
What will be an ideal response?
Oxygen, carbon dioxide, as well as other small
molecules, cross the plasma membrane through the process(es) of
a. diffusion. b. osmosis. c. endocytosis and exocytosis. d. active transport. e. facilitated diffusion