1. The process of photosynthesis requires a source of carbon dioxide. HYPOTHESIS: Increasing the concentration of carbon dioxide available to aquatic plants will increase
the rate of photosynthesis, as measured by the number of oxygen bubbles produced.
Independent variable:
Dependent variable:

Which fact represents evidence for the big bang theory?

What does the xylem do? stores the glucose captures the sunlight absorbs oxygen into the leaf carries water from the roots to the leaves

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.