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olya-2409 [2.1K]
2 years ago
8

How did the ecology of the african tropics change about 6 million years ago?.

Biology
1 answer:
Alborosie2 years ago
6 0

Answer:this area experienced warming temperatures and significantly reduced rainfall, resulting in the formation of the Sahara Desert.

Explanation: hope this helps <3

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Which information is needed to construct a geomagnetic time scale?
AleksAgata [21]

Answer:

the magnetic direction of rocks along the surface of Earth and the age of rocks along the surface of Earth

Explanation:

The earth's magnetic field or geomagnetic field is believed to originate from the movement of molten iron and nickel in the outer core.

During a period in which the earth magnetic field is normal, crystallising magnetic minerals in magma records the orientation of the prevailing geomagnetic field. At other times when the field reverses and the magnetic field orientation changes, magnetic minerals in cooling magma stores this record.

To create a geomagnetic time scale, geologists can assign absolute ages to the records of these paleomagnetic anomalies which are the reversals. The rock is dated using radiometric techniques and each period of reversal is ascribed an absolute geologic age. Therefore, the magnetic direction of rocks along the surface of Earth and the age of rocks along the surface of Earth helps to build the geomagnetic time scale of the earth.

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3 years ago
Sea turtles enter a high-energy state called ___ after they hatch.
blondinia [14]
ANSWER: the state is called Frenzy
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2 years ago
Complete a online search and write at least two sentences to explain the relationship between the two organisms (Humans and the
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7 0
2 years ago
Suppose it were possible to conduct sophisticated microscopic and chemical analyses of microfossils found in 3.5-billion-year-ol
soldier1979 [14.2K]

Answer:

The correct answer is option 3. a nucleus.

Explanation:

The first genetic material present in the early organisms were RNA which was present in the microscopic organisms back then 3.5 billion years ago which means it is normal to have RNA in such microfossils chemical analysis.

Since, the nucleus was not present in early life forms of prokaryotes like bacteria. so, it is unusual to find nucleus in the fossils of stromatolite rocks.

Thus, option III is the correct answer.

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3 years ago
List 3 natural services trees provide ?
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3 years ago
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