A totipotent stem cell can generate all cell types of both embryonic and extraembryonic lineages. 

TLS Online TPP Program

#Id: 4472

#Unit 13. Methods in Biology

Phase contrast and Differential interference microscopy are used to image live cells and unstained tissues.

TLS Online TPP Program

#Id: 4473

#Unit 13. Methods in Biology

Phase-contrast microscopy generates image in which degree of darkness or brightness of a region of specimen depends on the refractive index of that region.

TLS Online TPP Program

#Id: 4474

#Unit 13. Methods in Biology

Unobstructed direct light passes through a region of the phase plate that both transmits only a small percentage of the light and changes its phase slightly

TLS Online TPP Program

#Id: 4475

#Unit 13. Methods in Biology

Phase-contrast microscopy is suitable for observing single cells or thin cell layers.

TLS Online TPP Program

#Id: 4476

#Unit 13. Methods in Biology

Differential-interference-contrast (DIC) microscopy based on splitting of light into two and then recombining them to observe their interference pattern.

TLS Online TPP Program

#Id: 4477

#Unit 13. Methods in Biology

DIC microscopy is used for visualizing extremely small details and thick objects.