Which two statements describe evidence that directly led to the development of the theory of plate tectonics? A. Sonar confirmed the presence of mid-ocean ridges.
B. Each continent has its own unique mountain formations.
C. Fossils of plants found in South America differ from fossils found in Africa.
D. Seismic data showed that most earthquakes and volcanoes occur where crust is being formed or destroyed.

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?