Which of the following is NOT a part of the lymphatic system?
A. Tonsils
B. Spleen
C. Lymph node
D. Bone marrow
E. Pancreas
E. Pancreas
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Which part of the eye regulates the amount of light that reaches the retina?
a. fovea b. cornea c. iris d. lens
A research student is analyzing the nucleic acid of a virus. He finds that the nucleic acid contains thymine. From this it can be concluded that the nucleic acid
A) contains uracil. B) contains ribose. C) is actually a protein. D) contains glucose. E) is a strand of DNA.
Enzyme competition occurs when
A. one type of enzyme reacts with one type of substrate. B. an enzyme does not react with a substrate. C. three different types of enzymes react with one type of substrate. D. an enzyme stops a reaction.
Nutritional labels on food are based on a diet of:
What will be an ideal response?