The formulation of a model for a structure or for a process serves which of the following purposes?
A) It asks a scientific question.
B) It functions as a testable hypothesis.
C) It records observations.
D) It serves as a data point among results.
E) It can be arrived at only after years of experimentation.
Answer: B
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The contractile activity of smooth muscle cells within which type of blood vessel is primarily involved in the control of the organ blood flow and mean arterial pressure?
A) veins B) capillaries C) arterioles D) venules E) arteries
Which of the following is not a basic nutrient required by all animals?
a. minerals b. lipids c. vitamins d. proteins e. water
Most cases of Down syndrome are caused by three copies of chromosome number ________
Fill in the blank with correct word.
The sytoskeleton enabled the primitive cell to become motile.
a. true b. false