Why Do Leaves Change Color and Fall?

The video explains photosynthesis, focusing on chlorophyll and other pigments like carotenoids and anthocyanins. It discusses how deciduous trees manage resources in winter by reducing photosynthesis, leading to chlorophyll breakdown and revealing other pigments. The process of leaf abscission, where trees shed leaves to conserve resources, is also covered.

What is the primary role of chlorophyll in plants?

• To provide structural support

• To store nutrients

• To absorb sunlight for photosynthesis

• To protect against pests

Which pigments are responsible for the red and purple colors in some fruits?

• Xanthophylls

• Anthocyanins

• Carotenoids

• Chlorophyll

Why do deciduous trees reduce resources to their leaves in winter?

• To increase leaf growth

• To conserve energy

• To attract pollinators

• To enhance photosynthesis

What happens to the chlorophyll in leaves during the fall?

• It becomes more vibrant

• It breaks down

• It changes color

• It increases in concentration

How do trees facilitate the shedding of leaves?

• By strengthening the leaf stalk

• By forming a weak layer of cells

• By growing new leaves

• By increasing water supply to leaves