Scientists used major changes in life forms in the fossil record to from the geologic thin scale

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

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?

Me.henley said, “in the rat race we call life, only the strong will survive.” he may have been referring to