They have a special fin to swim in a unique way
The correct answer is B. Oxygen.
Oxygen, as a part of the atmosphere, also participates in UV protection, besides being necessary for breathing.
Answer:
false
Explanation:
a hormone is not an organ that secretes chemical substances into the bloodstream, hence your answer is false
hope that helps! :)
Phylogentic Trees are also called Evolutionary Trees. They're also a part of a group called Taxa.