T or F: a muscle can cause itself to elongate
What will be an ideal response?
False
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A seabird that has adapted very well to humans is the:
a. gull. b. tern. c. frigate bird. d. penguin. e. puffin.
Shingles is a disease observed mainly in the elderly that is a reactivation of which of the following?
A. herpes B. polio C. chickenpox D. AIDS
HIV is classified as a retrovirus because
A) it infects only cells with a CD4 receptor. B) it makes a DNA copy of its RNA once inside the host cell. C) this virus is composed of two cells surrounded by a lipoprotein coat. D) it reverts to an inactive form when it infects B lymphocytes. E) it causes the production of HIV antibodies.
Steroid-based hormones are able to move across cell membranes easily because they are water soluble
Indicate whether the statement is true or false