An open system is characterized by
A)inputs of energy and matter that come from outside the system.
B)energy and matter that are stored in the system,but not within the living tissue.
C)negative feedbacks rather than positive feedbacks.
D)the absence of secondary consumers.

Question

Quizplus · Accepted Answer

An open system is one that allows both matter and energy to enter and exit the system. This means that inputs of energy and matter come from outside the system, which is choice A. The other choices are not characteristic of an open system.

An Open System Is Characterized by