Page number 56 and 57.
Variations is the difference between individuals from the same species. This variation can be inherited from one generation to the next. The individuals that are better suited [adapted] to their environment will survive to reproduce. This is called natural selection.
1. Genetic Variation – Tiny differences in DNA make each living thing unique.
• Example: Some people have curly hair, while others have straight hair.
• Why it matters: It helps species adapt to changes, like some bacteria becoming resistant to antibiotics.
2. Morphological (Physical) Variation – Differences in body shape, size, or features.
• Example: Giraffes have long necks to reach tall trees, while zebras have stripes for camouflage.
• Why it matters: It helps animals survive in their environments by finding food or avoiding predators.
3. Behavioral Variation – Differences in how animals or people act.
• Example: Some birds fly south in the winter, while others stay in one place.
• Why it matters: It helps species survive by adapting their behaviors to seasons, predators, or food sources.
4. Physiological (Body Function) Variation – Differences in how bodies work inside.
• Example: Some people can drink milk easily (lactose tolerant), while others feel sick after drinking it.
• Why it matters: It helps living things survive in different conditions, like camels storing water to survive in deserts.
How do cultural and social factors lead to variation in human behavior and practices?
What is the significance of variation in statistical analysis, and how is it measured?
How does variation in climate affect ecosystems and biodiversity across the globe?