Answer:
The primary means for transmitting messages between the brain and the rest of the body is the <u>spinal cord</u>.
Explanation:
The spinal cord is the main pathway of the nervous system. The impulses are transmitted to the brain through bundles of ascending nerve fibers, while the descending fibers transmit impulses in the opposite direction. Signals are transported to and from different parts of the body along the fibers of the pair of spinal nerves, which form intersections with the spinal cord through their dorsal and ventral roots; the sensory and motor fibers converge in the gray matter of the medulla.
Magma is a mixture of molten and semi-molten rock found beneath the surface of the Earth.
I believe the correct answer is the final option - <span>If Earth formations can change over time, it is possible that even life on earth could change over millions of years.
Given that Darwin proposed his ideas about the origins of species and evolution, this is the only possible option to choose. It is impossible that life doesn't change at all, and millions of years are a long time to implement those changes. So it is only natural that organisms can change as much as the Earth can.
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<span>The answer is B. four haploid cells. In the meiosis, the number of chromosomes is reduced by half. It consists of meiosis I and II. In meiosis I, 2 haploid cells are formed from a diploid mother cell. These 2 haploid cells undergo meiosis II which is similar to mitosis. As the result of meiosis II, 2 haploid cells form from each haploid mother cell. Therefore, as the result of meiosis, 4 haploid cells are formed.</span>
