Ecosystems need producers because they are the start of the food chain.
Producers are consumed by first consumers, the second consumers and so on.
Electric field , and if that’s wrong it should be electric force . Those are the only two that make sense
Answer:
Explanation:
draws from a narrow range of basic sciences.
represents intelligent problem solving
Hope this helps you good luck (:
Answer:
Cell membrane
Explanation:
Sumer has come up with a great analogy for a presentation she is giving in her psychology class. The membrane encasing a neuron only allows some ions to pass in and out of its channels. And she is going to describe this cell membrane as a guard only allowing some patrons to enter and leave a controlled area.