Alfred Wegener's theory about Earth's past included a supercontinent made up of all the continents put together. What was the name of the supercontinent?

Pangaea

Americas

Gondwanaland

Laurasia

Linda and julia are trying to determine whether their ideas are scientific or pseudoscientific. linda's idea is free of bias. julia's idea gives the same result when tested repeatedly. which statement is correct about linda and julia's idea?

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?

Why are current extinctions of concern to enviromentalists?