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Many animals use the diurnal and seasona...

Many animals use the diurnal and seasonal variations in light intensity and photoperiod to time their

A

Migration

B

Reproductive activities

C

Foraging

D

All of these

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The correct Answer is:
D
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For many animals, light is important in that they use the diurnal and seasonal variations in light intensity and duration (photoperiod) as cues for timing their

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(a) Using Huygen's principle draw a diagram to whow propagation of a front originating from a monochrmatic source. (b) Desctibe diffraction of light due to a single slit. Explain formation of a pattern of fringes obtained on the screen and plot showing variation of intensity with angle theta in single slit diffraction.

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PHYSICS WALLAH-ORGANISMS AND POPULATIONS -NEET PAST 10 YEARS QUESTIONS
  1. Many animals use the diurnal and seasonal variations in light intensit...

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  2. which of the following is not an attribute of a population?

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  3. Match the items in Column I with those in Column II : {:(,"Column I"...

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  4. The impact of immigration on population density is:

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  5. Match Column -1 with with Column - II. {:("Column-I",,"Column-II"),...

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  6. Niche is

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  7. Natality refers to

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  8. Which one of the following plants shows a very close relationship with...

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  9. In a growing population of a country ,

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  10. Which one of the following population interaction is widely used in me...

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  11. Plants, which produce characteristic pneumatophores and show vivpary...

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  12. Mycorrhizae are the example of :

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  13. Asymptote in a logistic growth curve is obtained when

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  14. In a hypothetical population of 100 individual having 'r' = 0.5/female...

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  15. The principle of competitive exclusion was stated by :

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  16. If '+' sign is assigned to beneficial interaction '-' sign detrimental...

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  17. It is much easier for a small animal to run uphill than for a large an...

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  18. When does the growth rate of a population following the logistic model...

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  19. Gause's principle of competitive exclusion states that:

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  20. Most animals are tree dwellers in a

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  21. In which of the following interactions both partners are adversely aff...

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