What if? in the deserts of new mexico, the soils are mostly sandy, with occasional regions of black rock derived from lava flows that occurred 1,000 years ago. mice are found in both sandy and rocky areas and owls are known predators. what might you expect about coat colors in these two mouse populations? explain. how would you use this ecosystem to further test the camouflage hypothesis?

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.