why are algae green
Answers
Because of pigments like carotene. Most plants including some algae species have evolved pigments to absorb light at frequencies that chlorophyl can’t absorb. The pigments pass on their chemical energy to the chlorophyl, from which glucose is made.
Effectively, these pigments broaden the effective spectrum for photosynthesis. The first cyanobacteria had only chlorophyl, not pigments. So they could effectively use only the reddish part of the solar spectrum. The carotenes extended the effective part of the spectrum to the entire visible spectrum.
Most algae still don’t have carotenes. Only a few extant species of algae have carotenes. However, ALL the vascular plants have carotenes. This is why a dead leaf looks reddish. The chlorophyl has disintegrated, leaving only the carotenes.
Carotenes didn’t become common in algae until the Permian Triassic Extinction. The vascular plants probably had a few, but most marine algae didn’t.
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Answer:
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green algae is a paraphyletic group because it excludes the plantae.
like the plants the green algae contain two forms of chlorophyll which day used to capture light energy two fuels the manufacture sugars but unlike plants, they are primarily aquatic.
Explanation:
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