Answer:The answer is tiny organisms known as cyanobacteria, or blue-green algae.
Explanation:
These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and oxygen increase. Additionally, some sources you could use that I used to answer this question was
https://www.scientificamerican.com/article/origin-of-oxygen-in-atmosphere/
Dichotomous Keys are used to find out what type of animal,plant,fungi,prokaryote,eukaryote,or bacteria an organism is. A branching diagram is used to find what domain,kingdom,phylum,class,order,family,genus,species an organism belongs in.
Codominance - <span>A form of dominance in which the alleles of a gene pair in a heterozygote are fully expressed thereby resulting in offspring with a phenotype that is neither dominant nor recessive.
</span>Mutation<span> occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene.</span>
The best answer is B
Deltas are wet lands that form as rivers empty their water and sediments into another body of water such as an ocean, lake, or another river. Deltas can also empty into land although this is less common.
A river moves more slowly as it nears its end. This causes sediment, solid material that has been carried downstream by the water to fall to the river bottom.
The slowing of the river and the build up of sediment allows the river to break up from its single channel to several channels forming a triangular flow at the mouth called a delta.
