Question

why are algae and ferns both green?
they each contain chlorophyll that absorbs violet - blue lights and reflects green light.
they each contain chlorophyll that absorbs green light and reflects violet - blue light.
algae contain chlorophyll, and ferns contain ferredoxin that absorbs violet - blue light and reflects green light.
ferns contain chlorophyll, and algae contain ferredoxin that absorbs green light and reflects violet - blue light.

Explanation:

Chlorophyll is a pigment that absorbs violet - blue and red lights and reflects green light. Both algae and ferns contain chlorophyll. Ferredoxin is an iron - sulfur protein involved in electron transfer and is not responsible for the green color.

Answer:

They each contain chlorophyll that absorbs violet - blue lights and reflects green light.