All bacteria and viruses are
A) antibodies.
B) plasma cells.
C) pathogens.
D) causes of cancer.
E) microbes.
E
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The stimulus for secretion of neurotransmitters into the synaptic cleft is an increase in
A) potassium levels. B) chloride levels. C) sodium levels. D) calcium levels. E) neurotransmitter levels.
Using the product rule, the probability that parents heterozygous for two traits (AaBb) produce an offspring homozygous recessive for the same two traits (aabb) is
A) 1/4. B) 1/8. C) 1/16. D) 1/24.
Protecting the endangered whooping crane from extinction involved
A) captive breeding and reintroduction. B) collecting individuals from multiple small populations and combining them into a single large population. C) vaccinating the remaining population against plague. D) providing food during harsh winters.
Mad cow disease is caused by a
A. virus. B. bacterium. C. prion. D. viroid. E. virion.