Weather, Climate and Adaptations of Animals of Climate — Science STD 7 — Question
Gujarat BoardEnglish MediumSTD 7ScienceWeather, Climate and Adaptations of Animals of Climate1 Mark
MCQ
Travelling long distances to avoid winter is called:
✓
Migration
B
Adaptation
C
Hibernation
D
Aestivation
✓
Answer
Correct option: A.
Migration
Migration is the periodic change of place or position of a certain "species population" with purpose. Migration could be seasonal $($due to change in season$),$ annual $($on a particular day of the year$),$ lunar $($due to the position of the moon$),$ and altitudinal $($because of height$).$ Example: Birds like geese fly south for winter. Conditions for migration in birds:
$1.$ Scarcity of food.
$2.$ Adverse climatic conditions.
$3.$ Abundance of enemies.
$4.$ Increased level of gonadal hormones in the blood.
$5.$ Genetic imprint.
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