#Question id: 19048
#Unit 13. Methods in Biology
#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: 17668
#Unit 9. Diversity of Life Forms
#Question id: 1990
#Unit 4. Cell Communication and Cell Signaling
B cells interacting with helper T cells are stimulated to differentiate when
#Question id: 5236
#Unit 5. Developmental Biology
Following statements regarding to signaling pathways that control the properties of germline stem cells in drosophila.
A. The signaling molecules—the TGF-β-family proteins Dpp and Gbb as well as Hedgehog (Hh)—are maintain the self -renewal property of germline stem cells by the repression of differentiation factor.
B. Both E-cadherin and Arm are important in maintaining the germline stem-cell niche and regulate the proliferation of stem cells.
C. The signaling molecules—the TGF-β-family proteins Dpp and Gbb as well as Hedgehog (Hh)—are maintain germline stem cell
niche as well as self-renewal property.
D. Both E-cadherin and Arm are important in maintaining the self -renewal property of germline stem cells by the repression of differentiation factor.
Which of the following is correct?