Explain why when you exercise your heart rate change?
(less than 20 words)
​

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

Which locations on the map are low-pressure areas? a b c d e

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