During root nodule development rhizobia penetrate into root cortex cells. Next, proteins called ________ cause root cortex cells to divide, forming nodules.
A. leghemoglobin
B. flavonoids
C. nodulins
D. bacteroids
E. nod factors
Answer: C
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A woman is missing one of her X chromosomes. With which of the following conditions would she be diagnosed?
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Sitting in the sun on a hot day, a dog starts to pant and finally gets up and moves into the
shade. These activities help the dog maintain a constant body temperature; thus, this is an example of what process found in all living organism?
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Which of the following is an unusual event that occurs as trichomes differentiate?
a. DNA replication b. endoduplication c. cell expansion d. mitosis e. regulation of the cell cycle