Red blood cells are a part of the immune system
a. true
b. false
Answer: b. false
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Which of the following statements is not true? a. The size of the average family has been increasing in the United States since 1950
b. The size of the average family dwelling in the United States has been increasing since 1950. c. Larger homes require more resources and energy to build and maintain. d. The lifestyle of people in industrialized nations affects biodiversity.
Stretch-sensitive muscle spindles are indicated
by a. A. b. B. c. C. d. D. e. none of these
Nonsteroid hormones are ________ acting than steroid hormones because they activate molecules that are already present in the target cell in an inactive form
Fill in the blank(s) with correct word
The practice of breeding plants and animals for desirable traits, such as high crop yield, is called natural selection
Indicate whether the statement is true or false