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TLS Online TPP Program

#Question id: 5122

In amphibia, when epidermal (ectodermal) and mesodermal cells are brought together in a mixed aggregate, the epidermal cells move to the periphery of the aggregate, and the mesodermal cells move to the inside by the process of selective affinity. Which of the following statement describe the phenomena of selective affinity?

#Unit 5. Developmental Biology

  1. The inner surface of the ectoderm has a positive affinity for mesodermal cells and a negative affinity for the endoderm, whereas the mesoderm has positive affinities for both ectodermal and endodermal cells.

  2. The inner surface of the ectoderm has a negative affinity for mesodermal cells and a positive affinity for the endoderm, whereas the mesoderm has negative affinities for both ectodermal and endodermal cells.

  3. The inner surface of the ectoderm has a positive affinity for mesodermal cells and a positive affinity for the endoderm, whereas the mesoderm has positive affinities for both ectodermal and endodermal cells.

  4. The inner surface of the ectoderm has a negative affinity for mesodermal cells and a negative affinity for the endoderm, whereas the mesoderm has negative affinities for both ectodermal and endodermal cells

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TLS Online TPP Program

#Question id: 4990

#Unit 11. Evolution and Behavior

Fly species W, found in a certain part of the island, produces fertile offspring with species Y. Species W does not produce fertile offspring with species X or Z. If no other species can hybridize, then species W and Y
TLS Online TPP Program

#Question id: 32327

#Unit 1. Molecules and their Interaction Relevant to Biology

If these 2 reactions are happening together the what will the overall free energy of the 

 
TLS Online TPP Program

#Question id: 26958

#Unit 10. Ecological Principles

According to quadrate methods, which of the following graph represents with their Correct prediction?
TLS Online TPP Program

#Question id: 11229

#Unit 9. Diversity of Life Forms

Which is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell.
TLS Online TPP Program

#Question id: 7761

#Unit 5. Developmental Biology

Correct sets of genes are well known to be involved in aging and its prevention, and each set appears to be conserved between phyla and even kingdoms. 
a. DNA repair enzymes
b. proteins of the insulin signaling pathway
c. proteins in the mTORC1 signaling pathway
d. chromatin remodeling enzymes