If infant mortality rates are declining, how can the overall population growth rate slow down?
A) decreased adult survival
B) increased resource efficiency
C) decreased reproductive output
D) decreased demographic transition
C
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Calcium ions regulate contraction of smooth muscle cells by binding to _____
A) troponin B) tropomyosin C) actin D) myosin E) calmodulin
What is the coefficient of coincidence in this region?
Females heterozygous for the recessive second chromosome mutations px, sp, and cn are mated to a male homozygous for all three mutations. The offspring are as follows:
A) 0
B) 0.16
C) 0.33
D) 0.5
E) 0.66
Results of an ABO blood typing indicate agglutination reactions when anti-A and anti-B are added to the blood sample. The blood type of the individual would therefore be
A) A. B) B. C) O. D) AB. E) Not enough information given to determine blood type.
Learning is most common in animals that
A. are large. B. have large brains. C. live in complicated environments. D. must communicate in order to reproduce.