Answer:
I would believe the mesosphere would be the most difficult layer to breathe. Troposphere is where we are, ov we can breathe here, stratosphere would be hard to breath in as well
It's G, since plants need carbon dioxide to perform photosynthesis
Its b or d
Explanation:
None
Answer: enzymes change the Keq for chemical reactions.
Explanation: many enzymes change shape slightly when substrate binds. reactions occur at the "active site" of enzymes, where a precise 3D orientation of amino acids is an important feature of catalysis.
<span>gene mutation in action gene flow at work genetic drift as it happens natural selection in progress.</span>
