D. He controlled variables by studying one or two traits at a time
=====|>WHAT DO YOU MEAN<|===== :/
An environmental change is occurring due to continents shifting and moving to different parts of the earth’s surface is a long term change due to tectonic plates movements. if this happends for the continously then there will be different sesonal changes .
Answer:
Anaerobic processes do not require oxygen.
Explanation:
Aerobic processes are the ones that do require oxygen.
