The eastern gray squirrel, sciurus carolinensis, is found in many forests throughout the eastern united states. a biologist studying squirrel populations is convinced that the number of squirrels living in a given area is related to the number of acorn producing oak trees. he plans to compare the number of squirrels and the number of acorn producing oak trees in several different forests to see if the data support his idea. which scientific term best describes this biologist's assertion that squirrel populations and acorns are related?

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.

the fossil record provides evidence of a common ancestor to many species.