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TLS Online TPP Program

#Question id: 7123

In chicks, the formation of the neural tube relies on what cell biological processes?

#Unit 5. Developmental Biology
  1. Changes in cell shape in the neural plate are the only process required for neural tube formation.
  2. Changes in adhesiveness between the prospective neural tube cells and the prospective epidermis in the ectoderm are the only changes required for neural tube formation.
  3. Both changes in cell shape in the neural plate and changes in adhesion molecule expression in the neural tube are required during formation of the neural tube.
  4. Prospective neural tube cells in the ectoderm undergo medio-lateral intercalation, then involute and form the neural tube.
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TLS Online TPP Program

#Question id: 4617

#Unit 11. Evolution and Behavior

Which of the following is not an observation or inference on which natural selection is based?
TLS Online TPP Program

#Question id: 5774

#Unit 8. Inheritance Biology

Two healthy people have a child expressing a genetic condition caused by a dominant allele. What can you conclude about this situation?
TLS Online TPP Program

#Question id: 28662

#Unit 2. Cellular Organization

At which phase of the cell cycle loading and unloading of cohesins occur ?
TLS Online TPP Program

#Question id: 1343

#Unit 4. Cell Communication and Cell Signaling

Which of the following is not an example of a type of extracellular matrix?
TLS Online TPP Program

#Question id: 5434

#Unit 8. Inheritance Biology

Plant height of wild Solanum nigrum is controlled by polygene. A pure line plant with 60 cm height was cross to pure line plant having 20 cm height .All F1 plant having uniform height 40 cm. F1 plant was allowed to self-fertilization to produced 4/64 proportional of F2 plant having height 20 cm . What is number of polygene governing plant height?