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loris [4]
4 years ago
9

What percentage of all living things that have ever existed on

Biology
2 answers:
Ratling [72]4 years ago
8 0

D. 99% of all living things that have ever existed are now extinct

prisoha [69]4 years ago
5 0

<u>Answer:</u>

The correct answer option is d. 99 percent.

<u>Explanation:</u>

Extinction is the term used for the termination of any organism or of a group of organisms which are commonly called as species.

Death of organisms or a species results in their extinction. Out of all over five billion species that have ever existed on the earth, about 99 percent have already gone extinct.

While the current number of species that exist on earth have reduced to a range of 10 million to 12 million.

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Predict what will happen to the model of the cell in this experiment
Alika [10]

Do you meant the circled cell?

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3 years ago
List the atmospheric layers, temperature, altitude and density of those layers, and a unique object found in those layers.
Fiesta28 [93]

Five layers of the atmosphere are troposphere, stratosphere, mesosphere, thermosphere and exosphere.

<u>Explanation:</u>

Troposphere is the lowermost layer of the atmosphere which is found in the 0-12 km range. The temperature of the troposphere ranges from 15°C to 51°C.  Aircrafts driven by propellers can access the troposphere only.

Stratosphere is the layer of atmosphere that is second from earth. It is found in the 12-50 km range. Its temperature ranges from -51°C to-15°C. Jet-powered aircraft can access the stratosphere.

Mesosphere is the third atmospheric layer. It is found in the 50-85 km range. Its temperature ranges from -15°C to-120°C. rockets and rocket-powered spacecraft can access the mesosphere.

Thermosphere is the fourth atmospheric layer. It is found in the 500-100 km range. Its temperature ranges to about 2000°C. the International Space Station orbits in the thermosphere.

Exosphere is the topmost atmospheric layer. It extends to 10000 km above earth. Its  temperature is greater than 2000°C. most of the satellites that orbit the earth are found in the exosphere.

The density of atmospheric layers decreases while moving up along the layers. Thus troposphere has the maximum density.

7 0
3 years ago
Why would you use a model of DNA rather than the DNA itself to understand its structure​
olganol [36]

Answer:

heyyy

Explanation:

so you dont mess up the real DNA and cause something so you use the other dna to test stuff on

5 0
2 years ago
Read 2 more answers
What % chance is there for having a boy anf girl?
Mekhanik [1.2K]
There's 50% chance of having a boy.
There's nothing specific states you're gonna have a boy. It is just like luck.
<em>
It is simple, divide 100% by 2.</em>
3 0
3 years ago
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What are some strategies used to prevent foodborne illness when purchasing frozen or perishable foods?
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washing it, cooking it for things like meat (especially chicken)

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3 years ago
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