By measuing the amount of
they can determine the age of a rock.

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Diffusion and osmosis are forms of passive transport

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation