ALL of the following are natural human defenses against disease EXCEPT
a) interferon.
b) penicillin.
c) skin.
d) mucous membranes.
Ans: b) penicillin.
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The peripheral nervous system in a vertebrate can be divided into
A. the brain and spinal cord. B. the sympathetic and parasympathetic systems. C. the central nervous and sensory systems. D. the somatic and autonomic systems. E. muscles and glands.
Which of the following organs of the endocrine system secretes several hormones and stores two
hormones produced by the hypothalamus? a. pituitary gland b. pancreas c. pineal gland d. adrenal glands e. thyroid gland
The destruction of this organ would mean that you would no longer be able to absorb vitamin B12 through the digestive system
A) liver B) salivary glands C) large intestine D) stomach
What is the primary source for new, unique genes in a population?
A) mutation B) natural selection C) artificial selection D) crossing over