Photosynthesis and Leaf Shedding Concepts

The video explains the process of leaf color change in autumn, highlighting the role of chlorophyll and other pigments like carotenoids and anthocyanins. It describes how deciduous trees conserve energy in winter by reducing photosynthesis and shedding leaves. The breakdown of chlorophyll reveals other pigments, and a special cell layer helps detach leaves. The video concludes with a call to action for viewer engagement.

What is the primary function of photosynthesis in plants?

• To absorb water

• To generate sugars and oxygen

• To produce flowers

• To protect from insects

Which pigment is primarily responsible for the green color in leaves?

• Chlorophyll

• Xanthophyll

• Anthocyanins

• Carotenoids

What role do carotenoids play in plants?

• They absorb water

• They provide structural support

• They repel insects

• They give color to fruits and vegetables

Which pigment is responsible for red and purple colors in some fruits?

• Anthocyanins

• Xanthophyll

• Chlorophyll

• Carotenoids

What happens to chlorophyll in deciduous trees during winter?

• It changes color

• It becomes more vibrant

• It breaks down

• It increases in quantity

Why do deciduous trees shed their leaves in winter?

• To grow faster

• To increase photosynthesis

• To attract pollinators

• To conserve energy

What is the Latin meaning of 'deciduous'?

• To change color

• To grow

• To fall off

• To bloom

What triggers the process of leaf shedding in deciduous trees?

• Increase in rainfall

• Increase in sunlight

• Decrease in temperature and daylight

• Growth of new leaves

How do trees physically detach leaves during the shedding process?

• By growing new leaves

• By forming a special layer of cells

• By increasing chlorophyll

• By absorbing more water

What happens to the pigments in leaves as chlorophyll breaks down?

• They turn into water

• They change into chlorophyll

• They become more visible

• They disappear