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TLS Online TPP Program

#Question id: 4656

Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?

#Unit 11. Evolution and Behavior

  1. None of the organisms depicted by the tree ate the same foods.

  2. Some of the organisms depicted by the tree had lived in different habitats.

  3. The skeletal remains of the organisms depicted by the tree were incomplete (i.e., some bones were missing).

  4. Relationships between DNA sequences among the species did not match relationships between skeletal patterns.

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TLS Online TPP Program

#Question id: 28396

#Unit 5. Developmental Biology

VegT is critical in generating the germ cells, two genes activated by VegT protein that encodes the transcriptional factor as well as paracrine factors that instruct the cell layers to become their fate. which of the following statements is incorrect?
a) Sox17 paracrine factor that specify cells to be endoderm
b) Nodal transcription factors that instruct the cell layers above them to become mesoderm
c) Nodal paracrine factors that instruct the cell layers above them to become mesoderm
d) Sox17 transcription factor that specify cells to be endoderm
TLS Online TPP Program

#Question id: 28397

#Unit 5. Developmental Biology

During the specification of amphibian axes, in the absence of any induction cell leads to become which of the following fate?
TLS Online TPP Program

#Question id: 28398

#Unit 5. Developmental Biology

Spemann referred to the dorsal lip cells and their derivatives as the organizer, these derivatives cells are___
TLS Online TPP Program

#Question id: 28399

#Unit 5. Developmental Biology

Dorsal most vegetal cells of the blastula, which are capable of inducing the organizer is known as____
TLS Online TPP Program

#Question id: 28400

#Unit 5. Developmental Biology

Which of the following is the major candidate for the factor that forms the Nieuwkoop center ? 
TLS Online TPP Program

#Question id: 28401

#Unit 5. Developmental Biology

The Nieuwkoop centre is formed on the dorsal side of the embryo due to accumulation of beta-catenin which helps activate gene encoding protein, these protein known as____