The ancestors of modern-day fish were vertebrate chordates. vertebrate chordates are believed to have evolved from invertebrate chordates, which were similar to modern-day tunicates. what change might have occurred during evolution?

1. environmental factors, such as ph and temperature, can affect the function of an enzyme. a. true b. false 2. which of the following is an organic molecules (ex. vitamins) that an enzyme? a. coenzyme b. product c. active site d. substrate 3. how do enzymes effect the speed of a chemical reaction? a. they speed it up b. they slow it down c. they have no effect on the speed of a reaction 4. during a chemical reaction, an enzyme is used up so that it can only be used one time. a. true b. false 5. which of the following results from a chemical reaction that is catalyzed by an enzymes? a. active site b. product c. substrate d. coenzyme

Name one similarity and one difference between the morphology of a brachiopod and a bivalve

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above