Which of these factors decreases the rate of a chemical reaction within cells?
a. a co-factor
b. increased substrate
c. increased enzyme
d. cold temperature

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

Describe a desert community where there are fewer producers than consumers.

Aprimary producer stores 9,000 kcal. in the energy pyramid, if a primary producer is consumed by a first-level consumer, and that first-level consumer is consumed by a second-level consumer and the second-level consumer is consumed by a third-level consumer, how much energy is stored by the third-level consumer from the primary producer? *