Cyanobacteria were important for Earth's early atmosphere because they produce oxygen.
<u>Explanation</u>:
Cyanobacteria is a Phylum consists of the free living bacteria and endosymbiosis. Cyanobacteria is also called blue green algae which obtain energy through oxygenic photosynthesis and releases Oxygen gas in the atmosphere. Cyanobacteria is responsible for the early oxygen production in environment which changed the early reducing atmosphere of the earth into the oxidizing atmosphere that causes the event of great oxygenation that is rusting of the earth. During this period most of the anaerobes extinct or evolve to live as a parasite or symbol on in other hosts.
Ammonia C is your answer
DNA in particular is a key macromolecules for the continuity of life. DNA bears the hereditary information that’s passed on from parents to children, providing instructions for how (and when) to make the many proteins needed to build and maintain functioning cells, tissues, and organisms.
Hi
Firstly, we have to say that the rate of metabolism of a cell is a function of its mass, whereas the rate of exchange of materials and heat energy that metabolism generates is a function of the cell's surface area. Basically that's how it works
