Which of the following will disrupt Hardy-Weinberg equilibrium the least?
a. directional selection
b. stabilizing selection
c. migration
d. reduction to a small population size
e. non-random mating
B
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Answer the following statements true (T) or false (F)
1. In the evolution of plants, wood appeared before seeds. 2. Ginkgo trees and humans have similar chromosomal sex-determination systems. 3. The fossil record shows that pollen cones of conifers have become increasingly complex through their evolutionary history. 4. All gymnosperms are wind-pollinated. 5. Some conifers shed their leaves seasonally.
Which of the following most directly gives rise to primary vascular tissues?
a. protoderm b. apical meristem c. ground meristem d. vascular cambium e. procambium
What characteristics make an organism a good candidate for Mendelian studies?
What will be an ideal response?
Which of the following organisms causes a type of diarrhea with stools described as watery "rice water stools?"
A. Vibrio parahaemolyticus B. Helicobacter pylori C. Vibrio vulnificus D. Campylobacter jejuni E. Vibrio cholerae