Which of the following muscles is under voluntary control?
A. uterus
B. intestine
C. heart
D. biceps
D. biceps
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The taxon that is composed of similar species that have several important features in common but differ sufficiently to still maintain their status as individual species is which one of the fol-lowing?
a. Class b. Order c. Family d. Genus
The simplest eye structure, which is able to perceive light but not form an image, is called a
a. compound eye. b. single-lens eye. c. ocellus. d. ommatidia. e. photoreceptor.
Colon cancer is the second most common type of cancer in the United States, second only to
a. lung cancer. b. breast cancer. c. skin cancer. d. prostate cancer. e. uterine cancer.
When Mendel used true-breeding white flowers and true-breeding purple flowers as the parental generation, what were the results? (Purple flower is dominant over white.)
A) All of the offspring had purple flowers. B) Three-quarters of the flowers produced were white and one-quarter were purple. C) One-half of the flowers produced were white and one-half were purple. D) Three-quarters of the flowers produced were purple and one-quarter were white. E) All of the offspring had white flowers.