Where a branching point in a phylogenetic tree is called a ________, it illustrates that ________ has occurred.
A. clade; cladogenesis.
B. node; cladogenesis.
C. break; anagenesis.
D. node; anagenesis.
E. break; extinction of a species.
Answer: B
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A) organisms present on the skin. B) organisms within the digestive system. C) organisms present in and on the body. D) organisms present on the skin and in the digestive system.
Creative destruction is motivated by a desire for higher profits
Indicate whether this statement is true or false.
Lactate fermentation transfers the electrons and hydrogen ions carried by NADH directly to ____
a. acetaldehyde b. pyruvate c. carbon dioxide d. oxygen e. myoglobin
Enzymes are usually named based on
A. the substrates they act on and the type of reaction they catalyze. B. the type of reaction they catalyze. C. the substrates they act on. D. their molecular structure. E. All of the choices are correct.