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In which phase condensation of chromosom...

In which phase condensation of chromosome is completed and chromosome becomes visible, morphology can be easily studies they can be observed clearly under the microscope

A

prophase

B

Metaphase

C

anaphase

D

telophase

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Under which three conditions the changes in frequency can be studied under Doppler effect?

Read the following paragraph and answer the following questions given below it : Construction of a compound microscope : (i) Acompound microscope consists of a metal tube fitted with two convex lenses at the two ends. These lenses are called the objective lens ( the lens directed towards the object ) and the eyepiece ( the lens directed towards the eye ). Both the lenses are small in size , but the cross section of the objective lens has a short focal length . the focal length of the eyepiece is more than that of the objective lens . (ii) The metal tube is mounted on a stand . thr principal axes of the objective lens and the eyepiece are along the same line . The distance between the object and objective lens can be changed with a screw . It is possible to change the distance between the objective lens and the eyepiece. Working : (i) The object to be observed is illuminated and placed in front of the objective lens. slightly beyond the focal length of the objective lens. it's real , inverted and enlarged image is formed by the objective lens on the other side. (ii) This intermediate image lies with in the focal length of the eyepiece. It serves as an object for the eyepiece. The eyepiece works as a simple microscope . the final image is virtual, highly enlarged and inverted with respect to the original object . It can be formed at the minimum distance of distinct vision from the eyepiece . The final image is observed by keeping the eye close to the eyepiece. Use: This microscope is used to observe blood cells , microorganisms , etc. In a compound microscope , which lens has greater focal length ?

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NIKITA PUBLICATION -CELL DIVISION-EXERCISE
  1. Which of the following is true?

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  2. In late prophase…. Disappears

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  3. In which phase condensation of chromosome is completed and chromosome ...

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  4. Chromosomes are migrated towards equator and get arranged at equator o...

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  5. In Metaphasic plate

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  6. In which stage of cell division the counting of chromosome can be done

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  7. Which phase is of short duration

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  8. The movement of chromosomes is dependent on

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  9. During anaphase, movement of daughter chromosome towards the poles is ...

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  10. In Anaphase, the chromosomes attain different shapes. It is due to the

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  11. The number of chromatids present in a chromosome during Anaphase of Mi...

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  12. Centromere splits and chromatids or daughter chromosomes separate ... ...

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  13. Centromere is concerned with

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  14. Despiralisation takes place during

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  15. Which one is not possible due to mitosis ?

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  16. Region of chromosomes where force is exerted during separation of chro...

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  17. During the movement of the chromosomes in anaphase to the poles the is

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  18. The changes occuring inTelophase are completely reverse to that of

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  19. In which phase.the reconstruction of two daughter nuclei takes place

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  20. Nuclear membrane and nucleolous reappears, Golgi complex and ER etc. r...

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