scientist hypothesize that the development of organisms with which ability led to the collection of oxygen in earth atmosphere

1 answer:

5 0

The answer is tiny organisms known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen. In fact, all the plants on Earth incorporate symbiotic cyanobacteria (known as chloroplasts) to do their photosynthesis for them down to this day.

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Secretion of which hormone is controlled by a positive-feedback mechanism?

Gnom [1K]

I think the correct answer from the choices listed above is the last option. It is the hormone oxytocin that is controlled by a positive-feedback mechanism. Oxytocin is normally produced by the paraventricular nucleus of the hypothalamus and released by the posterior pituitary.<span> Hope this answers the question.</span>

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3 years ago

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What directly influences deepwater currents? temperature and pressure salinity and wind temperature and salinity wind and pressu

tamaranim1 [39]

<h3><u>Answer;</u></h3>

Temperature and salinity

<h3><u>Explanation;</u></h3>

Differences in the density of water can cause currents to form and move.
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The different densities cause the water to move, forming a density current. In the oceans, the deep,bottom currents are colder and saltier than the surface currents.

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hichkok12 [17]

C) a phenol compound

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3 years ago

As matter cools it usually decreases in volume thus making its particles<br> do this

lesantik [10]

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The particles slow down as they lose energy.