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Questions and Answers
What is the primary purpose of adaptation in living organisms?
What is the primary purpose of adaptation in living organisms?
- To form symbiotic relationships
- To make changes to fit new situations (correct)
- To grow larger in size
- To increase reproduction rates
What happens to chlorophyll in plants during the autumn season?
What happens to chlorophyll in plants during the autumn season?
- It breaks down, resulting in leaves changing color (correct)
- It disappears, leading to leaf growth
- It increases in concentration, making leaves greener
- It remains the same, causing leaves to stay green
Which behavior do animals exhibit during winter to cope with food scarcity?
Which behavior do animals exhibit during winter to cope with food scarcity?
- Photosynthesis
- Hibernation (correct)
- Estivation
- Dormancy
What characteristic changes in animals when they hibernate?
What characteristic changes in animals when they hibernate?
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What is migration in animals primarily related to?
What is migration in animals primarily related to?
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Study Notes
Adaptation: Overview
- Adaptation involves changes to acclimate to new environments or situations.
Human Adaptation
- During winter, humans wear heavier clothing to maintain body warmth.
Plant Adaptation
- Chlorophyll, the green pigment in leaves, is essential for photosynthesis (food production).
- In autumn, shorter days and reduced sunlight lead to the breakdown of chlorophyll, causing leaves to change color (yellow, red, brown) and eventually fall off.
- During winter, the lack of chlorophyll results in dormancy, where plants become inactive.
- Plants re-emerge from dormancy in spring and summer, becoming active again.
Animal Adaptation
- Animals face food scarcity in winter and adapt through two primary strategies:
- Hibernation: Long-term state of reduced metabolic activity characterized by slow heart rate and breathing. Example species include bears and mice.
- Migration: Movement of large animals to different locations to access food or warmer climates during colder months.
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