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Brilliant_brown [7]
2 years ago
15

Please help match!! :)

Biology
1 answer:
antiseptic1488 [7]2 years ago
7 0
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1. D
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4. B
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Please help ASAP! Describe at least one way in which each of Earth’s subsystems was altered during the Precambrian era.
trasher [3.6K]

The Precambrian era envelopes the major bulk of the history of the Earth, beginning from the creation of the planet approx 4.5 billion years ago and terminating with the origination of composite, multicelled forms of life approximately 4 billion years after.

The Precambrian refers to the earliest of the geologic ages that are signified by the distinct layers of sedimentary rock. The Earth was about more than six hundred million years old when life started. The planet had cooled down from its native molten state, creating a solid crust and oceans formed by water vapor in the atmosphere.

At about three billion years ago, the atmosphere of the Earth was virtually devoid of oxygen. At approximately 2.4 billion years ago, oxygen was discharged from the seas as a waste product of photosynthesis by cyanobacteria. The levels of the gas slowly raised, attaining about 1 percent around two billion years ago.

Approximately 800 million years ago, the levels of oxygen attained about 21 percent and started to breathe life into more composite species. The oxygen-rich ozone layer was also created, protecting the surface of the Earth from the harmful solar radiation.


8 0
3 years ago
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If an animal has both male and female reproductive organs, it is called?
qaws [65]
C. Hermaphrodite
Because duosexual is just sexuality, duerterstome doesnt really make sense besides it sounding like duo and bisexual is sexuality. 
6 0
3 years ago
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WHO IS RESPONIBLE FOR THE REACTIONS OF CELLULAR RESPIRATION
tatyana61 [14]

Answer:

Mitocondria is responsible for the reactions in cellular respiration.

Explanation:

Mitochondria have an important role in cellular respiration through the production of ATP, using chemical energy found in glucose and other nutrients. Mitochondria are also responsible for generating clusters of iron and sulfur, which are important cofactors of many enzymes.

3 0
3 years ago
Question 6 of 10
Delvig [45]

Answer:

matter is:  Anything that takes up space and has mass

5 0
2 years ago
The table lists some human activities. A student claimed that out of these activities, sleeping is the only activity in which en
anastassius [24]

Answer:

No

Explanation:

In every action you make you use energy, when you sleep you still have to breathe and regulate tempetaure. If you stopped giving energy to your cells as you sleep you not be able to breathe.

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