Effect of Light on Animals

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Author:
Anonymous
ID:
147548
Filename:
Effect of Light on Animals
Updated:
2012-04-14 05:14:52
Tags:
Effect Light Animals Biology
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Description:
Higher Biology - Unit Three - Effect of Light on Animals
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  1. What kind of behaviour can light trigger in animals?
    Rhymical
  2. Many animals are seasonal breeders. What does this do to the activity of their reproductive organs?
    They become active at certain times of the year
  3. Animals who have lots of babies tend to be long-day / short-day breeders?
    Long-day
  4. Give an example of a long-day breeder
    • Rabbits
    • Birds
  5. Animals with a longer-gestation (pregnancy) eg red deer have a short-day breeding cycle. Mating occurs in autumn, triggered by the _______ photoperoids and young are born in the summer?
    decreasing
  6. What is the biological significance of light triggering mating behavious in animals?
    • Several months of plentiful food and mild temperatures
    • Offspring grow and become strong before winter
  7. Day length also triggers behaviour such as...?
    • Hibernation
    • Migration
  8. What is biological significance of light triggering hibernation / migration in animals?
    The animal can survive winter when conditions in Britain would be severe and food is scarce

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