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Alex Ar [27]
3 years ago
6

15. These photosynthetic organisms can live in extreme environments, sometimes harnessing energy from chemicals, and are among s

ome of the oldest organisms on Earth.
Οalgae
O protists
O cyanobacteria
O diatoms
Biology
1 answer:
maxonik [38]3 years ago
4 0

Answer:

cyanobacteria

Explanation:

the answer of this question the 3rd one, because if you were to think and look up the oldest Bactria it would be that answer.

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What is the boundary between the earths lower mantle and the upper mantle called ?
Alenkasestr [34]

Answer:

i have trusted my best to answer

Explanation:

Edit

The upper mantle of Earth is a very thick layer of rock inside the planet, which begins just beneath the crust (at about 10 km (6.2 mi) under the oceans and about 35 km (22 mi) under the continents) and ends at the top of the lower mantle at 670 km (420 mi). Temperatures range from approximately 200 °C (392 °F) at the upper boundary with the crust to approximately 900 °C (1,650 °F) at the boundary with the lower mantle. Upper mantle material which has come up onto the surface is made up of about 55% olivine, 35% pyroxene and 5 to 10% of calcium oxide and aluminum oxide minerals such as plagioclase, spinel, or garnet, depending upon depth.

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3 years ago
In some coastal areas, the air temperature is high throughout the day. There is often precipitation in the late afternoon. Which
kondor19780726 [428]
B. Rain hope I helped
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3 years ago
The Old Faithful geyser found in Yellowstone Park is an example of _____. a feature resulting from earthquake activity a feature
Monica [59]

The given blank can be filled with a feature resulting from hot volcanic rock.  

The geysers refer to the rare characteristics on Earth, only about 1000 of them prevail, and more than half of those are situated in Yellowstone. For a geyser to develop, there must be a source of volcanic heat, enough groundwater, and a geologic plumbing system via which the heated water can escape.  

The absconding of water takes place when the groundwater is heated by the hot volcanic rocks. The intensifying steam bubbles push the water above via the fissures in the rock until they overflow from the geyser.  

With the absconding of the top layers of the water, the pressure on the hotter waters below diminishes, leading to a violent chain reaction of explosions, which expand the volume of the rising boiling water by up to 1500 times or more.  


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2 years ago
The value of nation's currency increases as the ___________increases
stepan [7]

B: Demand

Explanation:

If the demand increases the Nation's currency values also increases

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