PLEASE HELP Which way does the warm air particles flow in the northern hemisphere?
A. east-west
B. north-south
C. north-east
D. south-north

Environmental differences within ecosystems are generally caused by

Match the examples to the correct level of organization. 1. system level roses, snakes, puppies 2. organism level roots, stamens, leaves 3. tissue level bone, cartilage, blood 4. organ level heart, veins, arteries

Aprocedure done under controlled conditions to test a hypothesis is an inquiry.