A hospital laboratory technician injects a dye into a vein in your right arm. What is the first chamber of the heart that the dye will reach?
A. left atrium
B. aorta
C. left ventricle
D. right atrium
E. right ventricle
Answer: D
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Nematocysts are
a. reproductive cells. b. excretory organs. c. sets of muscle cells. d. circulatory cells. e. defensive cells.
Differential reproductive success is equivalent to:
a. evolution. b. competition. c. mutation. d. natural selection. e. adaptation.
While of the following techniques or tools has provided information regarding the nature of viruses, which one had to be developed before the genetics, biochemistry, and life cycles of viruses could be thoroughly studied?
A. viral cultivation techniques B. serological techniques C. scanning electron microscopy D. transmission electron microscopy
Albinism is an autosomal recessive trait in humans. Assume that there are 100 albinos (aa) in a population of 1 million. How many individuals would be expected to be homozygous normal (AA) under equilibrium conditions?
A) 100 B) 999,900 C) 980,100 D) 10,000 E) 19,800