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Kay [80]
3 years ago
14

How many years did the precambrain era span

Biology
1 answer:
Vlad1618 [11]3 years ago
5 0

Answer:

Explanation:

It is estimated that the Precambrian Era lasted between 3.9 and 4 billion years. Many scientists believe that this era accounts for 90 percent of the world's history.

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When scientists discuss the Sixth Extinction, they are referring to which pattern in the rate of extinction?
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Explanation:

The Holocene extinction, otherwise referred to as the sixth mass extinction or Anthropocene extinction, is an ongoing extinction event of species during the present Holocene epoch (with the more recent time sometimes called Anthropocene) as a result of human activity.[3][4][5] The included extinctions span numerous families of plants[6] and animals, including mammals, birds, reptiles, amphibians, fishes and invertebrates. With widespread degradation of highly biodiverse habitats such as coral reefs and rainforests, as well as other areas, the vast majority of these extinctions are thought to be undocumented, as the species are undiscovered at the time of their extinction, or no one has yet discovered their extinction. The current rate of extinction of species is estimated at 100 to 1,000 times higher than natural background extinction rates.

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8 0
3 years ago
The axial Skeletonwitch all of the other bones of the skeleton are connected to that of skeleton​
Ivan

Answer:

The axial skeleton includes all the bones along the body's long axis. ... The axial skeleton includes the bones that form the skull, laryngeal skeleton, vertebral column, and thoracic cage. The bones of the appendicular skeleton (the limbs and girdles) “append” to the axial skeleton.

Explanation:

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In which one of the following locations can a person hear the echo of a sound?A. At least 33.2 meters behind the reflecting surf
valentinak56 [21]
<span>The location in which a person is more likely to receive an echo of the soud being sent is at least 16.6. meters in front of the reflecting surface. Therefore, the answer is to this item is letter A. The speed of sound without any interference is only about 340 m/s traveling through the vibration of the media in which it passes through. </span>
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Can you break a mixture of cornstarch and water?
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Yes it is possible to break a mixture of cornstarch and water
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Earth’s magnetic field can make a magnet out of an iron bar by causing the magnetic domains to a. move back and forth between th
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<span>d. line up in the same direction.

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