When bones of a joint slip out of places, it is known as _____
a. a sprain
b. a strain
c. arthritis
d. a dislocation
e. a break
ANSWER: d
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DNA repair:
A. can fix chromosomal inversions and translocations. B. can involve excision of bases flanking a distortion in the helix. C. always prevents errors. D. involves a set of proteins that are always active. E. is only active during DNA replication.
Four of the five answers listed below are used in descriptions of neuron membranes. Select the
exception. a. gate b. pump c. wave of depolarization d. channel e. synaptic cleft
Which of the following statements is true?
A) Arthropods have an open circulatory system, while annelids have a closed circulatory system. B) Vertebrates have an open circulatory system, while annelids have a closed circulatory system. C) Vertebrates have an open circulatory system, while arthropods have a closed circulatory system. D) Annelids have an open circulatory system, while molluscs have a closed circulatory system.
What is the role of the iris?
a. to adjust the opening of the pupil in response to light b. to make the opening of the pupil larger c. to make the opening of the pupil smaller d. to protect the surface of the eye