Water that flows over land and has not been absorbed into the ground

is called

groundwater

surface water

top water

Most of the current human population growth is found in (developed / developing countries

How can some single-celled organisms survive even though they are really simple

Do humans have thick rib cages

Which class of molecules can directly cross the cell membrane without the aid of transport proteins? Choose one: A. Ions B. Sugars C. Uncharged gasses D. Amino acids

What two things can make a molecule polar

A scientist claims plants can communicate with each other in a variety of ways. justify the claim of the scientist and describe the types of responses that result from the communication of two different plants.

Which of these scenarios illustrates natural selection due to behavior

What is a device that converts energy of motion into electrical energy

Which type of connective tissue makes up the greatest proportion of the skeleton of a human embryo?

Which substance is not absorbed by the body when using snuff?