Which of following is not an example of mechanical weathering? A a gopher burrowing in the ground and loosening rock/soil. B a tree's roots growing in a cracked rock. C iron oxide weakening and breaking down a rock. D ice expanding cracks in a rock.

You can reduce glare in snowy weatuer by?

Layer r contains a well-known index fossil that is 100 million years old. based on this information and the principle of superposition, a. layers t and m are older than 100 million years, and layers x and g are younger than 100 million years. b. layers t, m, x, and g are all older than 100 million years. c. layers t and m are younger than 100 million years, and layers x and g are older than 100 million years.

Logistic growth curves are density-dependent. select the best answer from the choices provided t f