#Question id: 3496
#Unit 11. Evolution and Behavior
Which of following favor adaptations for polygynous mating in species?
a. Male competition
b. Female competition
c. Male choice
d. Female choice
#Question id: 1964
#Unit 4. Cell Communication and Cell Signaling
A bacterium entering the body through a small cut in the skin will do which of the following?
#Question id: 31251
#Unit 5. Developmental Biology
#Question id: 7224
#Unit 5. Developmental Biology
Following statements are given regarding to the migration through primitive streak in chick.
A. Cells migrate to the primitive streak, and as they enter the embryo, the deep-moving cells give rise to the endodermal organs of the embryo, as well as to most of the extraembryonic membranes.
B. The migration of mesodermal cells through the anterior primitive streak and their condensation to form the chordamesoderm also appear to be controlled by FGF and Wnt signalling.
C. Wnt is expressed in the primitive streak and repels migrating cells away from the streak.
D. Once cells migrate away from the streak, further movement of the mesodermal precursors appears to be regulated by FGF8 proteins.
Which of the following statement is incorrect?
#Question id: 1021
#Unit 4. Cell Communication and Cell Signaling
Disease Control (CDC) determine that the agent causing the birds to die is the West Nile virus. Outbreaks of this illness have been observed in several other countries in Asia and the Middle East across the last 50 years, but not in the United States. With this information, what would be the best categorization of this infectious agent/disease