explain 3 types of evolution
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Divergent evolution- one species splits into two or more that become less alike as they evolve. The divergence of the great apes and humans
Convergent evolution- two dissimilar species come to look like each other. The ancestor of whales was a hippo-like animal that returned to the sea and eventually evolved to look like a fish.
Coevolution. Two species evolve together, so that they eventually come to benefit each other. Some species of orchids evolved to look like the species of insects that pollinate them; the pollinators are attracted to the flowers more easily.
Convergent evolution- two dissimilar species come to look like each other. The ancestor of whales was a hippo-like animal that returned to the sea and eventually evolved to look like a fish.
Coevolution. Two species evolve together, so that they eventually come to benefit each other. Some species of orchids evolved to look like the species of insects that pollinate them; the pollinators are attracted to the flowers more easily.
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Evolution is divided into three types:-
1. Micro evolution:- Microevolution is the occurrence of small scale changes in gene trequencies in a population, Over a few generations. It occurs at or below the species level. eg. Formation of subspecies or races.
2. Macro evolution:- Macro evolution operates above the species level and results in the formation of new genera, tamilles and orders. eg. Australian marsuplals.
3. Mega evolution:- The origin and evolution of new classes, phyla etc. e.g. Origin of amphibia from fishes, origin of reptiles from amphibia, origin of birds and mammals from reptiles.
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