<span>The question is asking "What is the main function of structural adaptations?" and the best answer is that A. They help the organism survive in its environment. Basically this is what drives the evolution the most - traces that help the organism survive in its environment are being promoted, and the offspring with those traces has the best chance for survival. </span>
Proximity, similarity, closure and simplicity
Answer:
Animals get rid of nitrogen by converting it int urea uric, acid and ammonia.
Explanation:
I think the answer is Time
Answer: nucleotide triphosphates that lack a hydroxyl
Explanation: