Nutrients move through ecosystems in different ways. which nutrient cycles through organisms, rivers, rain, and the atmosphere?

What is a population? a. all the members of the same species living in the same ecosystem at the same time b. the number of a species living in the same ecosystem over a period of time c. the total number of organisms living in an ecosystem at a point in time d. all the members of a food web in the same ecosystem

When animals eat, the food is stored and digested in the stomach or a similar structure. but when a unicellular organism like this paramecium eats, the food is stored in which organelle

What is the difference in the cell cycle between healthy cells and cancerous cells?