Which of the following is an example of how enzymes are catalyst? a)Enzymes can alter the free energy change (ΔG) for a chemical reaction.

b)Enzymes increase the free energy of the reactants to make the reaction go faster.

c)Enzymes provide the activation energy for the reactions they facilitate.

d)Enzymes lower the activation energy so that reactants absorb enough energy to reach transition state.

Acladogram is a branching diagram that represents suggested evolutionary relationships among organisms based on the presence of unique traits. a scientist discovers a new organism that lacks limbs and does not have a true backbone. the organism lays eggs to produce offspring and has a cartilage-like rod known as a notochord running along its dorsal surface. on the cladogram below, select the species to which the newly discovered organism is most closely related.

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.

What is the next step in the process after a substrate enters the active site of an enzyme