What observation led researchers to propose that chloroplasts evolved from cyanobacteria? O Both contain mitochondria.
O Both perform photosynthesis.
O Both provide structure to cells.
O Both produce proteins.
estion 18

Both perform photosynthesis.

Explanation:

Both perform photosynthesis.

Explanation:

Both perform photosynthesis led researchers to propose that Chloroplast evolved from Cyanobacteria.

Chloroplast is a organelle that contain the green pigment called chlorophyii which perform photosynthesis. This is found in both plant cell and algae cell. This trap light energy from sunlight and uses carbondioxide with water to produce sugar.

Cyanobacteria are known to be the ancestor of chloroplast and they are also refer to as blue green algae because they contain chlorophyii which is a photosynthetic pigment. The Cyanobacteria are able to perform photosynthesis because of chlorophyii which trap light energy from sunlight and uses carbondioxide and water to produce energy.

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.

not sure if this is what you'r looking for eubacteria and archaebacteria