#Question id: 1232
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following mutations might confer a competitive advantage to an athlete by raising his or her hematocrit?
a. excess production of erythropoietin
b. decreased production of erythropoietin
c. EpoR that cannot bind STAT5
d. EpoR that cannot bind SHP1
e. EpoR that cannot bind JAK2
#Question id: 4048
#Unit 3. Fundamental Processes
Which of the following operators is a target of cI gene production? ___
A. OR1 ___
B. OR2 ___
C. OL1 ___
D. OL2 ___
#Question id: 6969
#Unit 5. Developmental Biology
In Xenopus, the elongation of the mesoderm toward the anterior results from the intercalation of cells during a process called:
#Question id: 16962
#Unit 11. Evolution and Behavior
#Question id: 11703
#Unit 7. System Physiology – Animal
A female athlete who took testosterone-like steroids for several months stopped having normal menstrual cycles. What is the best explanation for this observation?