The receiving region of a vertebrate heart is
a. the superior vena cava.
b. the aorta.
c. the atrium.
d. the capillary bed.
e. all of these.
Answer: c
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Results from the study of globin variants indicate that ____
a. all amino acid substitutions cause severe phenotypic effects b. a change in a single nucleotide is sufficient to cause a genetic disorder c. extended chains of phosphorus molecules function to carry oxygen d. all of the changes in globin are due to changes in amino acid sequences e. sickle cell anemia is not primarily an inherited disease
Ghost shrimp live:
a. in burrows. b. under rocks on the mud flat. c. on the surface of the mud. d. in the water above the mud flat. e. symbiotically with bivalves.
__________ can be used to estimate the population density for mobile animals. Fill in the blank(s) with the appropriate word(s)
An individual suffers a bite from a bat, resulting in the transmission of the virus that causes rabies. In this case, how did the infection occur?
A) through direct contact B) through inhalation C) through vector-borne transmission D) through ingestion