The blood cells involved in defending the body from pathogens are

A. fibrin.
B. platelets.
C. white blood cells.
D. red blood cells.


Answer: C

Environmental & Atmospheric Sciences

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The difference between a plug-in hybrid and an electric car is that the plug-in hybrid

A) will not operate unless continuously connected to an AC electrical source. B) uses less carbon-based fuel than an electric car. C) still uses an engine and needs fuel whereas the electric car runs entirely on its battery. D) has a small battery and will run only 25% as far as an electric car.

Environmental & Atmospheric Sciences

Typically, when a company gets associated with a third-party linkage mechanism, ________.

A) the richness of the company's environment decreases B) the company can react more easily to the dynamism of the environment C) the complexity of the company's environment increases D) it loses its ability to enter into a strategic alliance

Environmental & Atmospheric Sciences

As more and more mass falls into a black hole, the radius of its photon sphere

A) increases. B) decreases. C) remains unaffected.

Environmental & Atmospheric Sciences

Igneous rocks are overwhelmingly composed of silicate minerals. Why is this so?

A) Silicates are very heavy. B) Silicates compose a huge amount of the earth's crust. C) Silicates are only found in igneous rocks. D) Silicates are very rare.

Environmental & Atmospheric Sciences