Answer the question using the accompanying figure. Which branch of this phylogenetic tree identifies Bacteria?
a. A
b. B
c. C
d. D
e. E
ANSWER: b
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Influential in the opening and closing of stomata.
Choose the letter of the best: A. abscisic acid B. auxin C. ethylene D. cytokinin E. gibberellin
Understanding how to inhibit myostatin production may lead to effective treatment of ____
a. increased muscle cell division b. addition of muscle companion cells c. stretching of individual muscle cells d. synthesis of new protein filaments e. overproduction of myostatin
Petals
A. protect the developing flower. B. attract pollinators. C. are part of the gametophyte. D. enclose and protect the ovule. E. produce pollen.
Often point mutations can cause a protein to be made that differs in just one amino acid. Which of the following changes is most likely to cause the greatest change in protein function?
A) a mutation that replaces a valine with an isoleucine B) a mutation that replaces a proline with an aspartic acid C) a mutation that replaces a glutamic acid with an aspartic acid D) a mutation that replaces a serine with a cysteine E) a mutation that replaces an asparagine with a glutamine