#Question id: 3296
#Unit 10. Ecological Principles
Some beetles and flies have antler-like structures on their heads, much like male deer. The existence of antlers in beetle, fly, and deer species with strong male-male competition is an example of
#Question id: 23556
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 19812
#Unit 12. Applied Biology
#Question id: 5256
#Unit 8. Inheritance Biology
If the experimental population of E. coli lacks an F factor or F plasmid, and if bacteriophage are excluded from the bacterial cultures, then which of these is a means by which beneficial mutations might be transmitted horizontally to other E. coli cells?
#Question id: 1395
#Unit 4. Cell Communication and Cell Signaling
Which of the following mutations would promote malignancy in cells whose proliferation is inhibited by TGFβ?
a. overexpression of Smad2
b. loss of Smad 4
c. overexpression of TGFβ receptor I
d. loss of TGFβ receptor II