The conditions needed for primary

succession

A. Are very rare.

B. depend on forest fires.

C. must happen before secondary succession.

A leech feeding off of human blood is an example of 1 commensalism competition mutualism parasitism predation

What is the total amount of living tissue within a given trophic level?

Which term best describes rewarding successive approximations of a target behavior?

Where in the cell does the second stage of cellular respiration take place

Which statements describe divergent boundaries? Check all that apply. Divergent boundaries form mid-ocean ridges. Divergent boundaries are found on land or undersea. Divergent boundaries form volcanoes.

When a Staphylococci species ferments mannitol on Mannitol Salt Agar, A. the Staphylococci cells turn yellow B. the Staphylococci colonies turn yellow C. the media around the Staphylococci colonies turns yellow

Which of these practices does the most to keep wind and water from Carrying away topsoil?

32. Explain why it is hard to classify organisms in Kingdom Protista? What are the definin characteristics of the kingdom?

Broken circuits can produce strong electric shocks.

How are earth's organisms and crust interdependent? read more >>?