Answer:
yeah
Explanation:
there would be a shortage of oxygen. Unicellular organisms include bacteria.
A film of water covers the gametophyte
I think the correct answer from the choices listed above is option A. Directional selection can be distinguished from disruptive selection by the elimination of extreme variations of traits. Directional selection is a natural selection where an extreme phenotype is favored than others.
Answer:
the action or process of precipitating a substance from a solution.
Explanation:
I hope this helps you!
According to a source the answer is <span><u>Cyanobacteria were the first organisms to produce oxygen in water, which then escaped into the atmosphere.</u>
These cyanobacteria species were the first ones to "produce" oxygen as a by-product of the photosynthetic mechanisms which enables organisms to make their own food. </span>
