I would say that bc most are young they are not of age to reproduce but in the future they will all be older (being able to reproduce
Answer: organic.
The other three being proteins, nucleic acids (dna) and carbohydrate. They are all made up of the same elements. But your answer is organic. Hope this helps.
Answer:
Regulate heat throughout it's body,
Explanation:
Countercurrent Heat Exchange is a normal and varied mechanism in organisms that utilizes parallel pipes of flowing fluid in opposite directions in order to save energy, such as blood flow. For example, a whale's tongue uses this system through the blood flow to the tip of the tongue, where the countercurrent heat exchange system heats up blood returning to the body.
Water is important to some organism.... i think