What best describes the cell theory?

a-scientist know all there is to know about cells, so the cell theory will not change

b- as technological advancements are made, the cell theory may change

c-a theory, once formulated, cannot be changed

d-the development of a synthetic cell has caused the cell theory to change

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?