Answer:
When a molecule moves down its concentration gradient is it participating in passive transport; moving up the concentration gradient requires energy making it Answer:active transport
I believe it would be a fossil of a reptile but I'm not a 100% sure about it.
Phylogenetic
Scientist use a phylogenetic tree to track the evolutionary history of a species.
Answer:Aqua
Explanation:Aqua is water meaning it’s also found in water