The best evidence of such phenomena could be a population's genetic variation decrease.
When a population bottleneck occur it means that for some reason (i.e. environmental events) the size of a population is largely reduced. This leads to reduction of the genetic variation in that new smaller population. When a bottleneck occur, the founder effect is normally seen, which is that one population is established by a small group of a previously larger population leading once again the genetic variation, now though with a bigger population, to be very reduced.
Answer:
Bones provide the structure for our bodies. The adult human skeleton is made up of 206 bones.
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Trees, bushes, moss and grass live in a forest habitat.
Began in the water
first evolved around 3500 million years ago
began as single celled organisms
Answer:
Iron and oxygen form rust if the atmosphere is moist.
