As cleavage progresses, the cells of the embryo _____ and the whole embryo ______.
Fill in the blank(s) with the appropriate word(s).
Answer: get smaller; stays constant in size
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A transcriptional repressor contains an amphipathic helix. Which of the following changes within the repressor would most likely disrupt its function?
A. serine to threonine B. aspartate to glutamate C. leucine to valine D. leucine to lysine E. valine to methionine
Which of the following is a major function of the ovaries?
A. They manufacture the sex hormones, estrogen and progesterone. B. They comprise the canal through which babies are delivered. C. They are the organs directly responsible for a woman's orgasm. D. They hold and nourish the developing fetus.
Which of the following statements regarding cDNA libraries is false?
a. They are usually double stranded DNA. b. They are composed of DNA synthesized with the use of reverse transcriptase. c. They are composed of DNA synthesized from an mRNA template. d. They contain introns and exons. e. They contain DNA that is complementary to the mRNA from which it was synthesize
Solutions containing pure alcohol or water-alcohol mixtures are called aqueous.
a. true b. false