Match the following types of nervous systems with their descriptions. 1. central increases or speeds up a process 2. peripheral the brain and spinal cord 3. somatic sensory and motor neurons 4. autonomic voluntary nerves 5. sympathetic decreases or slows down a process 6. parasympathetic involuntary nerves

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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