Suppose a DNA replication error is not corrected. After two cell divisions, how many of the four daughter cells
contain this mutation (assuming that the mistake was never corrected)?
a. none
b. one
c. two
d. three
e. four
ANSWER: e
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Which one of the following proteins is not known to regulate translation through interaction with the 3' UTR of the mRNA?
A. CPEB B. Maskin C. eIF4E D. PUF proteins
Neandertals were first discovered near and named for:a
the Neander River in Africa. b. the Neander Valley in India. c. the Neander Mountains in France. d. the Neander Bay in Canada. e. the Neander Valley in Germany.
A student is staring directly at a bird outside the classroom window. The image of the bird is focused at the very center of the macula, a small pit called the ________, which is lined with highly packed photoreceptors
Fill in the blank(s) with correct word
Paleontologists are scientists who study the fossil record. They can use the fossil record to identify a common ancestor. What is a common ancestor?
A) species that became extinct as the environment changed B) species that left a complete history of its existence in the fossil record C) species from which two or more species evolved D) species that suddenly appears in the fossil record and then just as quickly disappears