Answer:
b. Bacteria photosynthesizing dissolved carbon dioxide in oceans
Explanation:
The levels of oxygen that we know nowadays in the atmosphere have not been like this in the more distant past. In order for the oxygen to start building up and change the composition of the atmosphere, something needed to happen, and that something was the cyanobaceteria. The cyanobacteria was able to perform photosynthesis, so it started to use the dissolved carbon for it, while in meantime it was releasing oxygen in the atmosphere. As the cynaobacteria was growing in numbers, over the course of millions of years, it managed to propel enough oxygen in the atmosphere so that the other organism can start developing, thus changing the world forever.
The earliest event enabling oxygen production in Earth's atmosphere was cyanobacteria, also known as blue-green algae, photosynthesizing dissolved carbon dioxide in oceans and releasing oxygen as a byproduct.
The earliest event that allowed for the production of oxygen in Earth's atmosphere was b. Bacteria photosynthesizing dissolved carbon dioxide in oceans.
During the first two billion years of Earth's existence, the atmosphere was anoxic - it lacked molecular oxygen. The only living organisms were anaerobic organisms, which can survive without oxygen. The process began to change with the appearance of phototrophs, autotrophic organisms which convert solar energy into chemical energy, and later cyanobacteria or blue-green algae evolved from these simple phototrophs.
Cyanobacteria began the oxygenation of the atmosphere by undertaking photosynthesis and releasing oxygen as a by-product. Their emergence and the resulting increase in atmospheric oxygen allowed for the development of more complex life forms, and the colonization of land, as the ozone layer (formed from oxygen) could absorb harmful ultraviolet light.
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Answer:
The correct option is
'part a forest is cut down to construct a housing development'
Explanation:
Interspecific competition can be described as the competition which arises between organisms of different species living in an area. On the other hand, intraspecific competition can be described as the competition which arises in organisms of the same species due to limited resources in an area.
When apart of a forest will be cut down, the resources for the organisms living in the forest will become lesser. As a result, the organisms will fight for the limited resources and this will result in interspecific competition.
Answer:
part a forest is cut down to construct a housing development
Explanation:
Plato/edmentum
Answer:Spain and france
Explanation:
how is it possible?
The part of the lithosphere that carries the crust is known as a tectonic plate. It is composed of the crust and upper mantle, and moves over a semi-fluid layer of the mantle, causing geological events.
The section of the lithosphere that carries the crust is typically referred to as a tectonic plate. The lithosphere is the outermost shell of a terrestrial-type planet and is made up of the crust and the portion of the upper mantle. Tectonic plates can carry both oceanic crust and continental crust. These plates move over the semi-fluid layer of the mantle known as the asthenosphere. The motion of these tectonic plates can cause geological events like earthquakes and the creation of mountain ranges.
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