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musickatia [10]
3 years ago
13

How do the atmospheric conditions near the beginning of Precambrian time contrast with the atmospheeic conditions that are prese

nt now? Which organism is largely responsible for this change?
Biology
2 answers:
Art [367]3 years ago
7 0
Early pre-cambrian period the atmosphere consisted only of nitrogen and carbon dioxide without oxygen.

<span>A Prokaryotic cell does not contain a nucleus. It only contains one chromosome and is a single-celled organism. It was the only form of life on earth for millions of years. Examples of a Prokaryotic cell are the different types of bacteria present today.

</span><span>Autotrophs obtain energy by the process of photosynthesis. Any living organism need energy to survive and autotrophs are no different. Two types of autotrophs are present and they are Photoautotrophs and Chemoautotrophs. The Photoautotrophs rely on the energy produced during the process of photosynthesis and the Chemoautotrophs get their energy from most of the inorganic substances. Phtoautotrophs actually get their energy from the sunlight and then convert it into reusable form. In case of Chemoautotrophs ammonia is an important source of energy for them.</span>


Darya [45]3 years ago
5 0

Answer:

The atmosphere has a much greater percentage of oxygen now that it did before. Cyanobacteria is the organism that is largely responsible for this change.

Explanation:

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Answer:D

Explanation:

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6 0
2 years ago
Read 2 more answers
What structure is found outside the cell membrane and provides protections and support to the cell?
Lyrx [107]
I believe that would be the cell wall
6 0
2 years ago
Read 2 more answers
Energy flows through an ecosystem in one ____, from the sun or organic compounds to ____ and the to various ____ . ((HELP ME PLE
vlabodo [156]
Hi!

Energy will flow through an ecosystem in one <em>direction, </em>from the sun or inorganic compounds to<em> autotrophs </em>and then to various <em>heterotrophs. </em>

The energy flow in an area will be delivering light energy to <em>autotrophs</em>, which make their food from the energy the sun produces. 

The energy flow also delivers energy via inorganic compounds to <em>heterotrophs</em>, which do not make their own food.

Hopefully, this helps! =)
8 0
3 years ago
Muscles work in _________________________________________, contracting and relaxing. These muscles are called __________________
7nadin3 [17]

Answer:

the human body first. 2 nd part joints

4 0
3 years ago
Difference between a lymphatic organ and a lymphatic nodule
Llana [10]

Answer:

The organs- thymus, tonsil, appendix and spleen constructs the lymphatic organ system and the lymph nodule is the collection of small lymphoid tissue.

Explanation:

The most significant part of immune and vascular system is the Lymphatic system. This system is consisted of some organs, like- spleen, thymus, tonsil and appendix, mainly named as lymphatic organs. These organs contribute to the function of defend in the immune system.  

Lymph nodules, however, are the collective small lymphoid tissue. These nodules are found in the area that is exposed to microorganism and it helps in fighting them.  

6 0
2 years ago
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