The part of the brain that coordinates voluntary muscular movements is the
What will be an ideal response?
cerebellum
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Topsoil plays an important role in the ecosystem service of ____.
A. biodiversity B. ecosystems C. natural resources D. win-win solutions E. nutrient cycling
in what situation might natural selection maintain a recessive allele even if it is harmful
a. homozygous recessive individuals have a higher fitness than heterozygous individuals but only rarely survive long enough to reproduce b. mutation rates are high enough that the recessive allele reappears even though it is lethal c. individuals that are heterozygous for a gene have a higher survival and reproductive rate than individuals that are homozygous for the gene d. homozygous dominant individuals have a higher survival and reproductive rate than individuals that are heterozygous for the same gene
Which of the following is the most cleanly burning fossil fuel available, producing the least carbon dioxide per unit of energy released?
A) nuclear energy B) coal C) kerosene D) natural gas E) petroleum
The era of "ancient life" is the ________ era
A) Mesozoic B) Paleozoic C) Cenozoic D) Precambrian