Watson and Crick discovered:
A) X-ray crystallography.
B) that genetic information resides on chromosomes.
C) that DNA is the genetic material.
D) the structure of DNA.
Answer: D
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Which of the following is NOT a function of the integumentary system?
A. defense against pathogens B. fluid transport C. supporting the weight of body structures D. protection from dehydration E. regulation of body temperature
Small, fishlike marine chordates, pointed at both ends with no distinguishable head, in which the notochord runs the entire length of the nerve cord, are called
A. arrow worms. B. tunicates. C. acorn worms. D. lancelets. E. lampreys.
What is the most common ecosystem on Earth?
a. marine ecosystems b. freshwater ecosystems c. terrestrial ecosystems d. arboreal ecosystems
Why does consumption of alcohol stimulate urination?
A. It inhibits ADH secretion. B. It stimulates vasopressin. C. It stimulates oxytocin. D. It inhibits aldosterone. E. It stimulates ADH secretion.