B. organisms most "it" for their environment will survive and e
26. which of the following was most similar to the first living things on earth?
a. bacteria
b. fish
c. dinosaurs
d. sponges

Option A. Bacteria.

Explanation:It is presumed that, over millions of years of evolution, abiotic molecules evolved into the self-replicating molecules by means of natural selection. Cyanobacteria, or blue-green algae is a bacteria which was one of the oldest fossils found on earth. These microbes conduct photosynthesis: using sun light, water and carbon dioxide to produce carbohydrates and oxygen.Cynobacteria played a major role in forming oxygenated atmosphere. The first living things on the planet Earths was single-celled micro-organisms which lack a well defined cell nucleus were known as prokaryotes, and bacteria belongs to prokaryotes ans hence among given options bacteria matches the most for the first life form on earth.

Result: Among the given choices bacteria was most similar to first living things on earth.