Why does photosynthetic rate decline when the CO2 level is reduced?

The sun heats earth mainly through what?

Which of the following body processes exemplify circadian rhythms? A. sleeping and walking B. blood pressure C. body temperature D. all of these

Name three items in nature that contain high concentrations of proteins.

Heat and pressure can turn all other rocks into __ rock

10. What happens to atmospheric pressure as a person rises in altitude? O A. It decreases O B. It's unaffected by changes in altitude, O C. It increases OD. It changes based on the time of year. L ad on the review nane)

A cheeseburger from a fast food restaurant contains 19 g of fat, 20 g of carbohydrate, and 28 g of protein. How many kcal of energy does the cheeseburger contain

How do enzymes catalyze chemical reactions (don't just say "they lower the activation energy", give me specific mechanisms) ?

What must happen before the cell can go through mitosis? Interphase.

Belle's grandfather lives in a region where the temperature drops below 0*F at night. When belle visited her grandfather, they hiked up a hill. Belle noticed that a lot of rock had cracks in them.

The genetic condition of an organism that has two identical alleles for a given trait.