This is best described as how an animal responds to stimuli in its environment:a
behavior.
b. learning.
c. proximate causes.
d. ultimate causes.
e. direct fitness..
A
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The average adult carries 10 times more microbial cells (1014) than human cells (average about 1013).
Answer the following statement true (T) or false (F)
During glycolysis molecules of glucose are
A. broken down by enzymes to form two molecules of pyruvate. B. bonded by enzymes to form three molecules of pyruvate. C. broken down into three molecules of pyruvate. D. broken down in oxidation, and releasing carbon atoms as CO2. E. bonded covalently to form two molecules of pyruvate.
The sun's energy is produced by:
a. nuclear fission reactions. b. nuclear fusion reactions. c. electromagnetic radiation. d. ultraviolet radiation. e. infrared radiation
Nutrients reach cells in the epidermis by ________
A) moving out of blood vessels that originate in the hypodermis and extend into the epidermis B) moving out of blood vessels in the epidermis C) moving out of dermal blood vessels and diffusing through tissue fluid to the epidermis D) All of the above are true.