Transgenic crop plants have been created that do all of the following except
a. grow two kinds of crops, like the pomato which produces both tomatoes and potatoes.
b. are resistant to insect damage.
c. are resistant to herbicides.
d. produce human hormones or antibodies.
e. transgenic plants have been produced that can do all of the things listed.
e. transgenic plants have been produced that can do all of the things listed.
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White muscles are designed to contract
a. quickly. b. quickly and for short periods. c. slowly. d. slowly for short periods. e. slowly for long periods.
Calcium ions used for muscle contraction are stored in which part of the muscle cell?
a. the nucleus b. the Golgi apparatus c. the sarcoplasmic reticulum d. the ribosomes e. the lysosomes
All of the following are features of the scientific method EXCEPT
A) hypothesis formulation. B) observation and experimentation. C) deductive reasoning. D) supernatural causes. E) repeatable by other scientists.
Which statement best describes why packed red blood cells are usually transfused instead of whole blood?
A) Whole blood contains antibodies that could attack the recipient's antigens on their red blood cells. B) Packed red blood cells are smaller than whole blood cells and therefore enter the bloodstream faster than whole blood. C) Whole blood contains plasma proteins that could cause edema in the patient. D) Packed red blood cells provide the red blood cells the recipient needs without adding plasma that may change their fluid volume too much. E) Whole blood is diluted with plasma so the recipient might not receive the needed number of red blood cells.