TLS Online TPP Program

#Question id: 7104


The grafting of the dorsal lip of the blastopore from an early Xenopus gastrula onto the ventral side of an early embryo will result in

#Unit 5. Developmental Biology
  1. the formation of two separate and independent embryos
  2. the formation of two complete embryos joined along the ventral axis
  3. the formation of two sets of anterior structures joined along the ventral axis: a two-headed embryo
  4. the formation of two sets of posterior structures joined along the ventral axis: a two-tailed embryo
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TLS Online TPP Program

#Question id: 23151

#Unit 13. Methods in Biology

If the concentration of Ca2+ is high inside the cell and fura-2 dye is used to map the concentration which of the following conditions will prevail?
1. Fluorescence will decrease
2.  Fluorescence will increase
3. Emission of light at higher wavelength
4. Emission of light at lower wavelength
Which of the following options are correct?

TLS Online TPP Program

#Question id: 3372

#Unit 11. Evolution and Behavior

Fish, penguin and Dolphin are independently evolved similar traits as a result of having to adapt to similar environments or ecological niches.

A. On a molecular level, this can happen due to random mutation in unrelated taxon to adaptive changes

B. This is the example of divergent evolution, occurred due to similar group of organisms inhabiting different environments

C. Similar phenotype are produced by identical change in orthologous gene

D. This is the example of convergent evolution, occurred due to similar group of organisms inhabiting different environments

Which of the following is the correct combination?

TLS Online TPP Program

#Question id: 13174

#Unit 10. Ecological Principles

Studying species transplants is a way that ecologists

TLS Online TPP Program

#Question id: 5575

#Unit 5. Developmental Biology

Which of the following is the correct sequence of the zones in the primary growth of a root, moving from the root cap inward?

TLS Online TPP Program

#Question id: 1809

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements is TRUE of αβ T-cells?