The fourth heart sound is produced by:

TLS Online TPP Program

#Question id: 14757

#Unit 5. Developmental Biology

Which of the following events are responsible for transition from fertilization to cleavage ?

TLS Online TPP Program

#Question id: 14758

#Unit 5. Developmental Biology

If contractile ring is disrupted during cleavage, which of the following process stop?

TLS Online TPP Program

#Question id: 14759

#Unit 5. Developmental Biology

Which of the following mechanical agent creates cleavage furrow during cleavage?

TLS Online TPP Program

#Question id: 14834

#Unit 5. Developmental Biology

Process by which a spatial and temporal pattern of cell activities is organized within the embryo so that a well-ordered structure develops:

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#Question id: 14835

#Unit 5. Developmental Biology

There are three main ways in which inducing signals may be passed between cells EXCEPT

TLS Online TPP Program

#Question id: 14836

#Unit 5. Developmental Biology

In the case of the French flag model. we assume a source of morphogen at one end and a sink at the other and that the concentrations of morphogen at both ends are kept constant but are different from each other. If the cells can respond to threshold concentrations of the morphogen, Thresholds can represent the

a. amount of morphogen that must bind to receptors to activate an intracellular signaling system. 

b. concentrations of transcription factors required to activate particular genes.

c. concentration at any point effectively provides positional information.

d. amount of morphogen that must bind to receptors to inactivate an extracellular signaling system.