AIDS, warts, and measles are caused by
A. bacteria.
B. viruses.
C. protozoa.
D. fungi.
B. viruses.
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During a systemic acquired resistance response, a plant ________
a. shelters nitrogen-fixing bacteria b. releases protective organic compounds c. folds leaves to minimize evaporation d. walls off wounds
Place the processes occurring in the digestive tract in the correct order.
I-Peristaltic waves of contraction propel the food along the esophagus. II-Gastric juices are secreted with the arrival of food into the duodenum. III-The acidic chyme is transferred through the pyloric sphincter. IV-HCl and pepsin begin digestion of proteins into shorter polypeptides. A. II, IV, and III B. IV, III, and II C. II, III, and IV D. I, II, and IV E. I, II, and III
Why is the Hardy-Weinberg law useful in spite of the fact that its conditions are never met in natural populations?
What will be an ideal response?
Which blood type is the universal donor?
a. A b. B c. AB d. O e. none of these