The movement of molecules from an area of higher concentration to an area of lower concentration without the participation of specific carrier molecules is called
A. osmosis.
B. passive diffusion.
C. active transport.
D. facilitated diffusion.
Answer: B
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Which of the following is NOT a characteristic
of Australopithecus afarensis?
a. chimpanzee sized brain b. narrow pelvis c. S-shaped backbone d. opening at the base of the skull e. more than one of these is NOT a characteristic of A.afarensis
An example of a secondary acquired immunodeficiency is
A. adenosine deaminase (ADA) deficiency. B. SCID. C. agammaglobulinemia. D. DiGeorge syndrome. E. AIDS.
From what kind of molecules are nonsteroid hormones made?
What will be an ideal response?
Because attenuated live vaccines contain viruses that are less virulent, many booster vaccines must be given to produce an effective immune response
Indicate whether the statement is true or false