In a system, the energy or material that leaves a system are referred to as the . A. outputs
B. inputs
C. components
D. processes

Explain why biological control methods are generally environmentally superior to chemical pest control methods.

The diagram shows the development of the oocyte and the follicle during the menstrual cycle. identify at which stage in the cycle the hormone levels are at their highest and most active.

Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.