How did stromatolites contribute oxygen to the early atmosphere?
by weathering of rocks
through photolysis
through methane degradation
through photosynthesis
Answer:
by weathering of rocks
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Depenns on what is consumed
The answer is an internal orifice or internal os.
The cervix or cervix uteri refers to the lower portion of the uterus in the human female reproductive system. The openings are called the internal orifice and the external orifice of the uterus.
The internal orifice or internal os refers to the upper terminal of the cervix, which opens into the uterus. On the other hand, the external orifice refers to the terminal of the cervix, which opens into the vagina.
Answer:
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Explanation:
It is caused by human-induced events. It is a far reaching and quick reduction in the biodiversity on Earth. Such an occasion is distinguished by a sharp change in the assorted variety and wealth of multicellular living beings. A mass extinction is under way and is being caused for the most part by people through territory modification or potentially pulverization, transport of obtrusive species, and overhunting and overharvesting.