15 points! Why are different soil types more threatened by desertification than others?

What best explains the inability for life to exist in earth early atmosphere

Which of these has happened to your food by the time it reaches your small intestine? a. all the macromolecules have been broken down completely. b. lipids and starches have been partially broken down. c. starches and proteins have been partially broken down. d. proteins and lipids have been broken down into subunits.

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm