Distal is indicated by
a. A.
b. B.
c. C.
d. D.
e. E.
Answer: b
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A small molecule of RNA is transcribed in the nucleus. It is folded, cleaved by dicer protein, and then
binds to a target molecule of mRNA. This molecule of RNA must be
a. miRNA. b. siRNA. c. an mRNA that was not properly capped. d. an mRNA that never received its poly-A tail. e. a transcript for a masking protein.
Which statement is true regarding bacteria?
A. Some bacteria are pathogens and harmful to humans, whereas lots of bacteria are helpful to humans. B. All bacteria are pathogens, but some harm humans more than others. C. All bacteria are helpful to humans. D. All bacteria are pathogens and harmful to humans.
Which of the three modes of selection would be most likely to result in speciation? Why?
What will be an ideal response?
Double fertilization produces a triploid tissue from
the union of a. one sperm nucleus and one female nucleus. b. two sperm nuclei and one female nucleus. c. one sperm nucleus and two female nuclei. d. two sperm nuclei and two female nuclei. e. one sperm nucleus and three female nuclei.