Which of the following lowers the activation energy of a biochemical reaction?
A) Presence of a catalyst
B) Low concentration of reactants
C) High temperature
D) Altering pH to 7
E) High concentration of products
A
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What role do bacteria play in mudflat food webs?
a. Primary consumers b. Primary producers c. All of these choices d. Consumers
Hepatitis is triggered by
a. dark colored colas. b. certain drugs, obesity, or environmental toxins. c. over use of of vitamins. d. drinking too much alchol one night. e. no known cause.
Which piece of evidence would allow you to reject the hypothesis of separate types?
A) fossil evidence showing that organisms have been on Earth for billions of years B) similarity of physical structures among species C) universality of DNA to all life D) fossil evidence that species have changed over time
Which of the following is the insertion of the latissimus dorsi muscle?
A. Posterior crest of the ilium B. Back of the sacrum C. Medial lip of the intertubercular groove of the humerus D. Spinous processes of the lumbar and lower six thoracic vertebrae