The human circulatory system A) helps maintain a constant body temperature.
B) carries cells that help protect the body from disease.
C) helps the body regulate body temperature.
D) all of the above

Select the correct answer from each drop-down menu proteins are

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?

The us council on environmental quality, the world wildlife fund of the united states, the ecological society of america, the smithsonian institution, and the international union for the conservation of nature have proposed four principles of wildlife conservation. which of the following does not apply to wildlife conservation? a) continuous monitoring, analysis, and assessment b) ecosystem maintenance that includes wildlife c) a plan encompassing entire communities of organisms and all renewable resources d) a continued interest in harvesting populations for sport