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Euglenoids have a protein rich layer cal...

Euglenoids have a protein rich layer called____which makes their body flexible.

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Pellicle
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There is a myth that immediately after heavy rains in forest, mushrooms appear in large number and make a very large ring or circle, which may be several metres in diameter. These are called as "fairy rings". Can you explain this myth of fairy rings in biological terms ? Discuss the mycilial structure in Agaricus and its soil borne nature.

Huygen was the figure scientist who proposed the idea of wave theory of light he said that the light propagates in form of wavelengths. A wavefront is a imaginary surface of every point of which waves are in the same. phase. For example the wavefront for a point source of light is collection of concentric spheres which have centre at the origin w_(1) is a wavefront w_(2) is another wavefront. The radius of the wavefront at time 't' is 'ct' in thic case where 'c' is the speed of light the direction of propagation of light is perpendicular to the surface of the wavelength. the wavefronts are plane wavefronts in case of a parallel beam of light. Huygen also said that every point of the wavefront acts as the source of secondary wavelets. The tangent drawn to all secondary wavelets at a time is the new wavefront at that time. The wavelets are to be considered only in the forward direction (i.e., the direction of propagation of light) and not in the reverse direction if a wavefront w_(1) and draw spheres of radius 'cDeltat' they are called secondary wavelets. Draw a surface w_(2) which is tangential to all these secondary wavelets w_(2) is the wavefront at time t+Deltat Huygen proved the laws of reflection and laws of refraction using concept of wavefront. Q. A point source of light is placed at origin, in air. the equation of wavefront of the wave at time t, emitted by source at t=0 is (take refractive index of air as 1)

ALLEN -DIVERSITY OF THE LIVING WORLD-Exercise
  1. Which protist possesses two flagella one lies longitudinal and other t...

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  2. Read the following points regarding protist, (A) Saprophytic nature ...

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  3. Euglenoids have a protein rich layer calledwhich makes their body flex...

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  4. are primitive relative of animals.

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  5. Which organism are used to make bread and beer?

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  6. Some hyphae are continuous tubes filled with multinucleated cytoplasm,...

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  7. The cell walls of fungi are composed of

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  8. Fungi prefer to grow-:

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  9. Write the name of three steps of sexual reproduction in fungi:-

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  10. Q. identify the following figure:-

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  11. identify the A,B and C in the given line diagram:-

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  12. Members of which fungal class are found in aquatic habitats and on dec...

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  13. Which fungus is used extensively in bio-chemical & genetic works?

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  14. Identify the A, B and C in the following table:-

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  15. Mushroom, Bracket fungi & smut fungi belong to which fungal class?

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  16. Most of the members of fungal class are decomposers of litter and help...

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  17. Which kingdom is characterized by heterotrophic, eukaryotic organisms ...

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  18. Bladderwort and venus fly trap are Example of (A) plant and Cuscuta ...

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  19. Identify the following figure with A,B,C and D

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  20. Who called contagium vivum fluidum and what does it stand for?

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