In 1859, Charles Darwin proposed his theory of evolution based on natural selection. What
observation about the natural world does this
theory explain?
O how the fossil record was formed
O how species change over time
how a species ahvays retains its characteristics
how catastrophic events lead to extinctions

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?