Melanin protects the skin from
a. desiccation.
b. abrasion.
c. ultraviolet radiation.
d. infrared damage.
e. invasion by bacteria
C
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All of the chemical reactions used to break down nutrients and build up components within the body are collectively known as
A. anabolism. B. catabolism. C. metabolism. D. proteolysis. E. hydrolysis.
Which of the following statements is true?
a. Organs receive either parasympathetic fibers or sympathetic fibers but not both. b. The sympathetic nervous system that supplies an organ will also provide parasympathetic fibers to it. c. Both the sympathetic and parasympathetic have either excitatory or inhibitory effects. d. The sympathetic branch of the sympathetic system usually speeds up the activities of the body. e. All of these are true.
Explain which features of cyanobacteria enable them to survive in a variety of environments.
What will be an ideal response?
You are dissecting an animal and notice a large store of fat. Based on this you can say that this animal contains abundant
A. carbon. B. lipid. C. potential energy. D. chemical energy. E. All of the answer choices are correct.