Human activity can affect ecosystems by removing producers, consumers, and decomposers. What limiting factors may result from human actions, and what effects might they have on the flow of energy and matter in an ecosystem?

During binary fission, what events must occur before the cell splits into two new cells?

How dose plate tectonics effect climate

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