Which of the following statements about antibody-mediated immunity is CORRECT?
A. It primarily defends against viruses that have already infected cells.
B. It is responsible for transplant tissue rejection.
C. It protects the body against cells that become cancerous.
D. It defends against parasites, bacteria, and viruses.
E. It primarily defends against bacteria that have already infected cells.
D. It defends against parasites, bacteria, and viruses.
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The diarrhea that is a symptom of diseases like cholera is due to problems in the function of which digestive organ?
A. stomach B. small intestine C. large intestine D. appendix E. gall bladder
The female gametophyte in flowering plants is usually consists of
a. a complete pistil. b. seven cells embedded in floral tissues. c. a single ovary. d. a seed. e. shoot parts bearing female flowers.
Each of the following is a challenge faced by a terrestrial plant except
A) buoyancy. B) desiccation. C) cells and tissues to maintain structure. D) variability in air temperature.
Which of the following is associated with the attachment of a bacteriophage to a bacterial cell?
A. random collisions B. chemical attractions C. receptor specificity D. both chemical attractions and receptor specificity E. random collisions, chemical attractions, and receptor specificity