Hormones are distributed throughout the body by the
__________ system.
a. exocrine
b. lymphatic
c. nervous
d. circulatory
e. integumentary
Answer: d
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Polyploid species are least common in
a. flowering plants. b. mollusks. c. insects. d. conifers. e. mammals.
Cytosine and thymine are the two types of bases found in DNA known as ______________________. Fill in the blank(s) with the appropriate word(s)
Refer to Figure 42-2. The neuron labeled 3 is:
a. an interneuron in the gray mater of the cord.
b. an interneuron in the white mater of the cord.
c. a sensory neuron in the gray mater of the cord.
d. a sensory neuron in the white mater of the cord.
e. a motor neuron in the gray mater of the co
Anaphylactic shock
A. occurs when the allergen has entered the bloodstream. B. is an immediate allergic reaction. C. is characterized by a sudden and life-threatening drop in blood pressure. D. All of these are true. E. None of these are true.