The genes discovered to date account for only about 5-10% of the total variation in adult height
a. True
b. False
Indicate whether the statement is true or false
True
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In an experimental situation, a student researcher inserts an mRNA molecule into a eukaryotic cell after she has removed its cap and poly-A tail. Which of the following would you expect her to find?
A) The mRNA is quickly converted into a ribosomal subunit. B) The cell adds a new poly-A tail to the mRNA. C) The mRNA attaches to a ribosome and is translated, but more slowly. D) The molecule is digested by enzymes because it is not protected at the end.
Which of the following is a multicellular mass that nourishes the embryo until it becomes a self-supporting seedling?
A) the endosperm B) a seed coat C) a fruit D) a cotyledon
Which of the following communication methods would be most effective for a species that lives in the tropical rainforest and is active at night?
A. tactile B. auditory C. visual D. chemical
Plant hormones
A) must be produced in large quantities to be effective. B) act on all cells they encounter. C) are chemical signals that influence growth and development. D) are rare and produced only in response to stress.