Which of the following is an example of biological control? a.
using chemicals that kill pests.
b.
using organic fertilizers.
c.
using a natural predator that kills pests.
d.
none of the above.

The key to stability is feedback between the reservoir and the fluxes into and/or out of the reservoir. assume that the rate of outflow from a reservoir depends on the size of the reservoir according to the following relationship: outflow rate= k x (size of reservoir), where k is a constant. a reservoir of water has a volume of 5000 liters, and the rate of outflow at steady state is 25 liters per minute. what is k? (give both the numerical value and its units.) what is the residence time? what is the relationship between k and the residence time?

In science and physics what is the standard unit of measure for speed?

Select all the correct answers. which three statements about electromagnetic radiation are true?