Leaves are green because ____________.
a. carotenoids absorb green light
b. carotenoids reflect green light
c. chlorophylls a and b absorb green light
d. chlorophylls a and b reflect green light
Answer: d. chlorophylls a and b reflect green light
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Which neurotransmitter stimulates skeletal muscle contraction, slows cardiac muscle contraction rate, and affects
mood and memory?
a. acetylcholine b. epinephrine c. dopamine d. serotonin e. an endorphin
What name is given to a region of DNA that varies from person to person?
A) genetic marker B) short tandem repeat C) sticky end D) restriction fragment
What does the pharynx open into?
A) the esophagus B) the epiglottis C) the trachea D) the larynx