The correct answer is - cyanobacteria.
The atmospheric oxygen came from the cyanobacteria. These were one of the earliest living organisms on Earth. The cyanobacteria was using photosynthesis in order to create its own food. The photosynthesis process requires sunlight, carbon dioxide, water, and oxygen. The oxygen is mostly released as a waste product from the process of photosynthesis, thus the cyanobacteria were literally releasing oxygen that was ending up into the atmosphere. As more and more cyanobacteria there were across the planet, more and more oxygen they were releasing into the atmosphere, slowly changing the composition of the atmosphere, and setting the basis of it as we know it now.
I believe the answer is <span>Fossil fuel plants are built closer to the oceans than geothermal plants.</span>
Answer:
D
Explanation:
smelling is not a physical change we can see that melting and cutting are physical changes
X has an elevation of 1600m
Y has an elevation of 1240m
Difference between the two elevations: 1600-1240=360m
Biochemical sedimentary rocks are sedimentary rocks created by the buildup of organic carbon (dead plant debris) in low-oxygen conditions (such as swamps).
When organisms utilize elements dissolved in air or water to develop their tissue, biochemical sedimentary rocks form. The calcareous skeletons of creatures such as corals, mollusks, and foraminifera are used to make most varieties of limestone.
Shells and bodies of submerged creatures are used to build biochemical sedimentary rocks. Chemical components from the water are extracted by living creatures and used to form shells and other body parts. Aragonite, a mineral related to and usually replaced by calcite, and silica are among the constituents.
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