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Neporo4naja [7]
3 years ago
15

Which statement is true about stromatolites?

Biology
2 answers:
Neko [114]3 years ago
5 0

they are layered mounds of deposits made by precambrian algae

lbvjy [14]3 years ago
3 0

Answer:

Stromatolites are the oldest forms of life for which there is clear fossil evidence.

Explanation:

Stromatolites are biogenic sedimentary rocks that are formed by capturing and binding sediment particles or precipitating dissolved substances as a result of the growth and metabolism of microorganisms in a body of water. They are mostly layered and often consist of very finely layered limestone. With their shell-like structure made of tubers, columns or undulating layers, some look like a cauliflower.

The oldest known fossils are mostly stromatolites, and they could therefore provide clues as to how life has developed from very simple to more complex forms.

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maks197457 [2]

Answer:

Bony Fish

Explanation:

i got it right on my test!

8 0
3 years ago
Read 2 more answers
PLEASE HURRY UP WILL GIVE BRAINLISET AND 30 POINTS THIS IS SCIENCE
diamong [38]

(1)

Troposphere – This is the densest layer and where weather events occur

Stratosphere – This is where the ozone layer is found. Some high altitude aircraft cruise in this layer.

Mesosphere – Temperatures drop with altitude in this layer

Thermosphere – This is where most of the meteorites that enter the earth’s atmosphere burn up. This layer takes up most of the Uv and X-rays from the sun. Most satellites orbiting earth are in this layer

Exosphere – almost akin to space due to the thinness of the layer. Molecules in the layer often escape into space

(2)

A ‘pause’ is a transition between the above-mentioned distinct layers. The tropopause, for example, occurs between the troposphere and the stratosphere and the stratopause between the stratosphere and mesosphere and thermopause is found between thermosphere and exosphere.

(3)

A temperature inversion is a rise in temperatures with altitude in a layer in the atmosphere. One layer exhibiting temperature inversion is the stratosphere. This is due to the ozone layer that absorbs UV light. The upper ozone absorbs most of the UV light, than lower ozone, exciting the molecules and making the higher altitudes in the layer to be warmer.

(4)

The ozone layer protects life on earth from the high energy UV radiation from the sun. UV is capable of causing double-stranded break on DNA resulting in genetic mutations on organisms. Most of these would be lethal. The Ozone absorbs most of the UV before it reaches earth's surface. Ozone is formed when an oxygen molecule reacts with another oxygen atom to form an O₃. The oxygen atoms are made from the splitting of an oxygen molecule by UV light.

Learn More:

For more on the atmosphere check out;

brainly.com/question/13633485

brainly.com/question/2846796

#LearnWithBrainly

5 0
3 years ago
Which statement BEST expresses the idea that emotions are like a GPS system?
shtirl [24]

Answer:

Where's the full question?

Explanation:

3 0
3 years ago
Which drink would be the best choice when sodium levels need to be restored
Finger [1]
Sports drinks are the best choice.
3 0
3 years ago
1. Hydrochloric acid is used to produce fertilizers and dyes, to pickle and clean metal products, and as a reagent in the photog
Shalnov [3]
Hydrochloric acid is a strong acid (fully dissociates when dissolved in water due to the polar covalent bond)
It is a very stable molecule
It is highly reactive with metals and with oxidising agents such as organic materials, alkalis, water etc.
Can be extremely corrosive if solution is concentrated.
4 0
3 years ago
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