Among the following, which number of carbons would be the most likely number of carbons for a
fatty acid from a living organism?
a. 8
b. 13
c. 16
d. 19
e. 26
C
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For many mammals, egg laying is a character that has been replaced by:
A. live birth. B. asexual reproduction. C. sexual reproduction.
Mitochondria possess all of the following except ________.
A. enzymes for photosynthesis B. 70S ribosomes C. metabolic enzymes D. electron carriers E. cristae
You notice in the fall that the oak trees on campus change color at slightly different times, even though the environment is the same for all the trees. What is the most likely explanation?
A) Natural selection is causing some trees to change. B) There are different alleles of the gene responsible for color change. C) The weather changes the genes of the oak trees each year. D) All the trees have the same genes, but each tree makes different proteins from the genes.
Activation energy can be described as __________.
A. energy needed to activate an enzyme B. energy released by a chemical reaction C. metabolism D. energy needed to activate the reactants and trigger a chemical reaction