Who is the oldest organism in example #1 ?

Cells are adapted to preform specific functions. which of the following terms refers to this capability?

Temperatures in ponds and lakes vary by season. select the best answer from the choices provided t f

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled