Why Are Leaves Green? Part 1

The video explores why plants are green due to chlorophyll, which absorbs sunlight for energy. Despite being green, chlorophyll is inefficient at absorbing green light, reflecting it instead. Historical theories suggest that ancient purple organisms absorbed green light, leaving other wavelengths for chlorophyll. This rivalry may have led to the dominance of green plants. The video also questions why plants didn't evolve black leaves for better light absorption, suggesting nature's focus on 'good enough' solutions rather than perfection.

What is the primary function of chlorophyll in plants?

• To repel insects

• To produce oxygen

• To absorb sunlight for energy

• To make plants appear green

Why is it surprising that chlorophyll is green?

• Because it should absorb all colors of light

• Because green is not a natural color

• Because it should only absorb green light

• Because it should reflect all colors of light

What color would plants be if chlorophyll absorbed all colors of light?

• Black

• Green

• Blue

• Red

What ancient organisms are thought to have influenced the color of plants today?

• Purple Archaea

• Green algae

• Red bacteria

• Blue fungi

What might be a reason plants did not evolve to have black leaves?

• Black leaves are too fragile

• Nature favors green for aesthetic reasons

• Green is sufficient for survival

• Black leaves would absorb too much heat