The people of Finland, who are secluded to some degree from the rest of the world by water, develop certain diseases due to the lack of genetic material from other ethnicities and races.
Physical barriers prevent fish from one stream from mating with fish from another stream, leading to a less varied gene pool among those fish. As time passes, the fish become unable to successfully mate with other groups.
A mountain range prevents two types of goat from mating, causing the gene pool to become less varied.<span>
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It is B. Thank you later please and do good on the test!
It decreases since a air less balloon is heavier than a Aired balloon
Low
Water is better at sticking together with other water molecules than it is with the "waxy surfaces".
