The shape of an enzymes active site fits the shape of a certain molecule that is affected by the enzyme. It's like a puzzle piece fitting into another puzzle piece. The molecule in the reaction being catalyzed fits into the enzyme. Hopefully this helps, this is how I was taught
Well if you wanna live correct
Answer:
a
Explanation:
you got to think single cell organisms were not abundant however the Co2 and salt compounds were as well as the oxygen needed to help evolve them which led the moncellular creatures to evolve into algae and fungi and then those 2 formed a symbiotic relationship to form lichen
C
Explanation:Only answer where they are trying to protect