Claim: Whales evolved from land mammals to water mammals.
Evidence: The first whales evolved over 50 million years. One of the first whales, such as Pakicetus, were land animals with long skulls and carnivorous teeth, much like many adaptable land mammals back then and today.
I think it’s the first one parasitism...
Answer:
it is a cell.
Explanation:
the cell is the structural and functional unit of all living organisms
