Explain the process of evolution through isolation that results in speciation.

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above

This is the interaction of two organisms where one is and the other is neither nor harmed.

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?