You find a sick plant in an arid environment. After studying it, you believe it is specifically defective in C4 photosynthesis. What nutrient might this plant be lacking?
A. Copper
B. Nickel
C. Molybdenum
D. Sulfur
E. Sodium
E. Sodium
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A paleontologist has recovered a bit of tissue from the 400-year-old preserved skin of an extinct dodo (a bird). To compare a specific region of the DNA from the sample with DNA from living birds, which of the following would be most useful for increasing
the amount of dodo DNA available for testing? A) RFLP analysis B) polymerase chain reaction (PCR) C) electroporation D) gel electrophoresis E) Southern blotting
The method of DNA replication, where each original strand is used as a template to build a new strand, is called the
A. conservative method. B. semiconservative method. C. disruptive method. D. continuous method. E. replication and amplification method.
In humans, the most frequently seen autosomal aneuploid is
A) monosomy 21. B) trisomy 13. C) trisomy 21. D) tetraploidy.
Which of the following acts in the small intestine to breakdown proteint?
A) trypsin B) pepsin C) bile D) amylase