Which of the following is an example of biological weathering?

A

animals burrowing in the ground

B

feldspar reacting with water to form clay

C

water freezing and expanding cracks in a rock

D

acidic water dissolving soluble rocks and minerals

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

Why are human population trends difficult to predict?

The variation among individuals, on which natural selection acts