Assertion (A): Commitment to androgenesis is achieved primarily by the abolition of pollen maturation gene expression. 

Reason (R): During induction, several hundred genes are upregulated or downregulated to facilitate the developmental switch

Select the correct option from:

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#Question id: 19454

#Life Sciences

Resolving power has the ability to distinguish between 

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#Question id: 19455

#Life Sciences

Resolution is improved by using 

1. Shorter wavelengths of light 

2. Gathering less light

3. Gathering more light

4. Longer wavelengths of light 

Choose the option with all incorrect statements?

TLS Online TPP Program

#Question id: 19456

#Life Sciences

Phase contrast, dark field microscopy are all light microscopy. These microscopes have their limit of resolution upto

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#Question id: 19457

#Life Sciences

Which microscopy can be used for viewing live cells and unstained tissues?

1. Fluorescence microscopy

2. Phase contrast microscopy

3. Dark field microscopy

4. Differential interference microscopy

5. Confocal microscopy

Which of the above combinations of microscopy is correct?

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#Question id: 19458

#Life Sciences

How phase contrast and DIC microscopy are used to image live cells and unstained tissues?

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#Question id: 19459

#Life Sciences

Phase-contrast microscopy depends on the refractive index of the region of specimen and generates image in which we see a pattern of