The number of individuals per unit area is the
A. age distribution.
B. biotic potential.
C. distribution ratio.
D. population density.
D. population density.
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The pH scale measures the concentration of ________ ions
a. oxygen b. hydrogen c. chloride d. sodium
Which of the following is false about AIDS?
a. It is caused by the human immunodeficiency virus. b. There may be no outward symptoms initially. c. It weakens the immune system, paving the way for opportunistic infections. d. Recent drug therapies have turned it into a curable disease. e. Viral particles may be transmitted via blood, semen, urine, and vaginal secretions.
What is the difference between pollination and fertilization?
A. Pollination is the movement of pollen from the male region of a plant to the female region. Fertilization is the union of a sperm and egg. B. Pollination is the movement of pollen from the female region of a plant to the male region. Fertilization is the union of a sperm and egg. C. Pollination is the same as fertilization. D. Fertilization is the movement of pollen from the male region of a plant to the female region. Pollination is the union of a sperm and egg.
The Adam's apple is actually a part of the
Select one: a. pharynx. b. larynx. c. glottis. d. vocal cords. e. trachea.