Simon is experiencing chest pain due to an insufficient blood supply to the heart. Saul's coronary arteries are nearly blocked, which is slowing blood flow to his heart. Sean has just experienced the death of some of his heart muscle tissue. What do these men have in common?
A. Angina
B. Atherosclerosis
C. Heart attack
D. Heart disease
Answer: D. Heart disease
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Gray matter is composed of axons with myelin sheaths
Indicate whether the statement is true or false.
With what do cytotoxic cells interact?
A. MHC-I proteins B. MHC-II proteins C. foreign antigen D. MHC-I and MHC-II proteins E. MHC-I proteins and foreign antigens
In the Hardy-Weinberg equation, p2 + 2pq + q2 = 1, 2pq represents the frequency of
A. homozygous dominant and heterozygous individuals. B. homozygous dominant individuals. C. homozygous recessive individuals. D. heterozygous individuals. E. homozygous recessive and heterozygous individuals.
The sum of all the different kinds of limiting factors is
A. biological amplification. B. environmental resistance. C. biotic potential. D. symbiosis.