What is regarded as a strong evolutionary mechanism for changing allelic frequencies?
A) migration B) selection C) mutations D) recombination
Answer: B
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The leading cause of pelvic inflammatory disease is ________.
A. gonorrhea B. Chlamydia infection C. genital herpes D. HIV infection E. syphilis
Which of the following is characteristic of slow-twitch fibers but not fast-twitch fibers?
A. Have few blood vessels B. Contract quickly C. Breakdown ATP slowly D. Store large amounts of glycogen E. Make up "white" muscle
Which of the following statements about
complement proteins is false? a. flag antigens for destruction b. can destroy pathogens directly c. enhance lymphocyte response d. exclusively bacterial DNA associated e. none of these are correct
Which of the following is NOT a part of the lymphatic system?
A. Pancreas B. Bone marrow C. Tonsils D. Lymph node E. Spleen