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.
A settled area with just one place to buy food is called a village.
Correct answer: A
This small settlement is a group of houses, together with other buildings such as a church and a school, in a country area and is usually found in a rural setting. Most villages have central point, which is the church or the marketplace.
Answer:
two sides of corresponding is similar side of corresponding side
Just did this question
Answer:This is wrong, there is a legal process to go through to get a citizenship in the US.
Explanation: The reason for this is to ensure that the President and the citizens will not get assassinated by terrorist
Four major parts of Earth work together as a complex system: rocks, water, air, and life.
The four parts are called the geosphere,hydrosphere<span>, </span>atmosphere, and biosphere.
Rocks- Geosphere
Water- Hydrosphere
Air- Atmosphere
Life- Bioshpere
Hope This Helps!! :)
