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zimovet [89]
3 years ago
5

How much of the organisms that lived on Earth do scientists believe are represented by the fossil record?

Biology
1 answer:
Nimfa-mama [501]3 years ago
8 0

Answer:

2%

Explanation:

The scientist believe that around 2% of the species that existed on Earth have been preserved in the fossil records. It is still a hot debate about it though, as there are only around 250,000 species identified in the fossil records so far, which is less than a quarter from the species that live in the present.

The reason why scientists believe that the majority of the species have not been preserved are very logical though. One of the reasons is that lot of species existed very long time ago, so their remains just didn't lasted so long. Other reason is the movement of the plates, where we have situation where plates that existed in the past have been totally suducted and melted in the mantle, while others are at the verge of it, so every fossil with them is melted and destroyed too. Another reason is that lot of species do not have hard parts, solid bone structure, so their preservation has been pretty much impossible,

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5 phases

Explanation:

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3 years ago
Jed was hospitalized for a hip surgery. He is eight years old, and is now exhibiting confusion about the time of day or day of w
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Answer:

The correct answer is delirium.

Explanation:

An unexpected variation in the brain, which leads to emotional disruption and mental confusion is known as delirium. It makes an individual difficult to remember, sleep, think, to pay attention, and several other consequences. One might experience delirium post-surgery, at the time of alcohol withdrawal, or with dementia.  

However, the condition is generally impermanent and can be cured efficiently. Delirium influences the emotions, mind, sleep patterns, and control of muscles. One may find it tough to concentrate or feel confused regarding his or her locations. One may also move gradually or briskly than generally, and may even encounter with mood swings.  

Thus, it can be concluded that in the given case of 8 year Jed, who had undergone surgery is not able to concentrate on anything and is feeling confused due to a condition known as delirium.  

5 0
3 years ago
Which type of reproduction is shown in the diagram?
Brums [2.3K]
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8 0
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Rasek [7]

Answer:

the trapping of the sun's warmth in a planet's lower atmosphere, due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface.

Explanation:

I think it can be incorrect also so refer to Science teacher also. also.

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Cystic fibrosis is a genetic disorder in which a particular gene does not make protein the way that it otherwise normally would.
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