The opening in the eye through which light passes is known as the ____

a. sclera
b. pupil
c. iris
d. lens
e. cornea


b

Biology & Microbiology

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Neurons of which nervous system relay information about the external environment to the brain?

a. central b. somatic c. autonomic d. sympathetic e. parasympathetic

Biology & Microbiology

In a pedigree chart, a male who does NOT

demonstrate the trait being studied is represented by

a. a darkened square. b. a darkened diamond. c. a clear circle. d. a clear square. e. a darkened circle.

Biology & Microbiology

Which of the following is least likely to be a

cause of extinction? a. asteroid impact b. human activity c. adaptive radiation d. continental drift e. climate change

Biology & Microbiology

Although the authors disagree completely on the use of GE crops, there are one or two points of view they share. Review the statements below and select one that represents a shared view.

a. Globally there is enough food available for all humans. b. Plant biotechnology is the best approach for conserving natural resources. c. People in some parts of the world will need more food. d. Agro-chemicals are a safe way to increase crop yields.

Biology & Microbiology