Which of the following components of the dermis is
incorrectly matched with its usual function?
a. blood vessels; nutrient supply
b. sweat glands; hormone secretion
c. oil glands; lubrication of hair and skin
d. hairs; insulation
e. receptors; pain
Answer: b
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A couple has five sons. What is the probability that their next child will be a girl?
A. 0% B. 25% C. 50% D. 75% E. 100%
Dana Reeve, the wife of actor Christopher Reeve, died at a young age from lung cancer, although she had never smoked. Her cancer was likely caused by
A) a germline mutation. B) two somatic mutations in the same lung cell. C) exposure to carcinogens. D) stress from caring for her husband, who had a spinal cord injury.
External fertilization is common in most
a. insects. b. amniotes. c. lizards. d. bony fish. e. bony fish and insects
Organelles used to in cell division are the
a. cilia. b. flagella. c. centrioles. d. microfilaments. e. Golgi bodies.