Primaquine and chloroquine are drugs used in the treatment of ________ infections.
A. gram-negative bacterial
B. gram-positive bacterial
C. viral
D. protozoan
E. fungal
Answer: D
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When the reproductive cells of different species are incompatible and cannot accomplish fertilization,
it is referred to as: a. behavioral isolation. b. gametic isolation. c. hybrid breakdown. d. temporal isolation. e. hybrid sterility.
Answer the following questions true (T) or false (F)
1. Contraction of the diaphragm causes exhalation to occur. 2. Pulmonary ventilation occurs because of pressure differences between the lungs and the external environment. 3. Digestion is a process of mechanical and chemical breakdown of larger food molecules into smaller ones that can be absorbed.
An evolutionary model of animal development explains how _____.
A. animal body plans are constrained by existing structures in ancestral organisms. B. homeotic genes are not universal among animals. C. homeotic genes are found only in fruit flies, where they are responsible for odd placement of appendages. D. new genetic lines are produced less by modification than by unique mutation. E. somites form as blocks of genes in cells randomly distributed throughout the body.
Which is a hormone that reduces blood volume and pressure by pulling more water out of the blood and increases urine volume?
A) renin B) erythropoietin C) atrial natriuretic hormone D) aldosterone