Circulatory systems ____
a. are found in all animals
b. result in slow distribution of nutrients and gases
c. include one or more hearts
d. are always closed systems
e. are found in cnidarians and flatworms
ANSWER: c
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Who is largely responsible for proposing the endosymbiosis theory?
A. Schimper, Wallin, Margulis B. Lyon, Margulis, Schimper C. Schimper, Wallin, Barr D. Barr, Lyon, Margulis
The rash of secondary syphilis
A. can last for months. B. does not impair function. C. causes severe itching. D. only lasts a few days. E. is intensely painful.
The systolic pressure for a normal young adult would be under
a. 60 mm Hg. b. 80 mm Hg. c. 100 mm Hg. d. 120 mm Hg. e. 140 mm Hg.
Malpighian tubules are used for excretion
____________________ Indicate whether the statement is true or false.