How is immune memory beneficial to a host organism?
What will be an ideal response?
Answer: Immune memory provides the host with the ability to immediately resist previously encountered pathogens. After the initial encounter with an antigen, the host is stimulated to produce effective antigen-activated antibodies, or TCRs. A subsequent exposure to the same antigen stimulates rapid production of large quantities of the same T cells or antibodies for future protection.
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A condition characterized by facial and deformities, genital anomalies, and cognitive impairments, is called ________ syndrome.
Fill in the blank(s) with the appropriate word(s).
A gram-positive bacillus identified as Lactobacillus is isolated in large quantities from the urine of a 16-year-old female. Based on this information, the patient should receive which antibiotic?
a. Penicillin b. Tetracycline c. Vancomycin d. No antibiotics should be administered.
Which of the following are vestigial structures?
A) Wings of bats B) Fish fins C) Hoofs of horses D) Pelvic bones of whales E) Vertebral columns in snakes
There is a good chance you will eat carrageenan today and that you will eat nori at some point in your life, if you haven't already. In either case, you will be eating a product of
A) brown algae. B) red algae. C) green algae. D) diatoms.