1. Mark the point on the Y axis that indicates the free energy of the reactants. Mark the point on the Y axis that indicates the free energy of the products.

2. What letter represents the activation energy of the reaction in the presence of enzyme?

3. What letter represents the activation energy of the reaction with no enzyme?

4. Is the reaction exergonic or endergonic? (remember exer-means energy is released, exits, and endo-means energy remains IN the product, its stored in there)

5. Use the started graph below to Draw a chemical reaction curve of the opposite process (draw an exergonic reaction if the above is endergonic or draw an endergonic reaction if the above is exergonic).

Enzyme speed up chemical reaction are which type of marcomolecule? a. carbohhydrates b. protiens c. lipids d. nucleic acids

The development of_ factored in the development of complex organisms.

On a recent expedition to a remote region of northern canada, scientists uncovered skeletal remains from about 100,000 years ago. surprisingly, all the skeletal remains, which included many species from differing biological families and spanned about two thousand years, showed evidence of experiencing temperatures in excess of 1000 degrees fahrenheit (or 538 degrees celsius). which of the following, if true, best explains the apparent paradox between the cold environment and the evidence of the bones experiencing hot temperatures? (a) chemical changes that naturally occur during the process of decay in only one north canadian species produce the same evidence of the species' skeletons being exposed to hot temperatures as the expedition scientists found. (b) a little over 103,000 years ago, a large fire is known to have occurred in northern canada. (c) strong evidence exists that as early as 70,000 years ago, homo sapiens around the world relied heavily on fire to cook animals. (d) in the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.