In a food chain, the arrows point in the direction that:

Energy flows, from the eaten to the eater

Which two processes cycle carbon between organisms and the atmosphere?

Photosynthesis and cellular respiration

Matter cycles, but energy flows one way and is lost as heat

The largest population it can support over time

12questions. Pick an answer and you'll see why right away.

The original source of energy for almost all ecosystems is:
In a food chain, the arrows point in the direction that:
About what fraction of energy passes from one trophic level to the next?
Which two processes cycle carbon between organisms and the atmosphere?
Plants cannot use nitrogen gas from the air directly. It is made usable by:
Which statement correctly describes energy and matter in an ecosystem?
The carrying capacity of an ecosystem is:
Which of these is a density-dependent limiting factor?
A population grows quickly then levels off at a steady value. This S-shaped pattern is called:
A relationship in which both species benefit, such as bees and flowering plants, is called:
After a forest fire, an area is recolonized by grasses, then shrubs, then trees over time. This is:
Burning fossil fuels releases carbon dioxide, a greenhouse gas, which contributes to: