#Question id: 7236
#Unit 5. Developmental Biology
Which of the following statement justified that the PMZ in chick is
functionally equivalent to the amphibian Nieuwkoop center?
A.
The posterior marginal zone produces Wnt8c and that, the PMZ cells secrete Vg1,
a member of the TGF-β family.
B.
PMZ cells capable of inducing the accumulation of β-catenin
C.
PMZ cells secretes BMP, a member of the TGF-β family.
D.
PMZ secretes its own Nodal antagonist—the Lefty protein.
Which of the following combination is correct?
#Question id: 10715
#Unit 10. Ecological Principles
Following table shows the presence (+) or absence (-) of five species in three communities (A, B, C):
Based on the above, which of the following is the correct order of diversity strength communities?
#Question id: 23248
#Unit 13. Methods in Biology
#Question id: 1987
#Unit 4. Cell Communication and Cell Signaling
A nonfunctional CD4 protein on a helper T cell would result in the helper T cell being unable to
#Question id: 31069
#Unit 2. Cellular Organization