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QveST [7]
3 years ago
10

How is modern earth different from earth over 4 billion years ago?

Biology
1 answer:
igor_vitrenko [27]3 years ago
5 0

Earth and its atmosphere are continuously altered. Plate tectonics shift the continents, raise mountains and move the ocean floor while processes not fully understood alter the climate. Such constant change has characterized Earth since its beginning some 4 billion years ago.

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In which part of a flower is pollen produced
Sliva [168]

Pollen is produced in the stamen.

Stamen is the male reproductive part of a flower that produces pollen. The stamen is composed of a slender filament and a compact body called anther. The anther within the stamen is where pollen is produced. The anther is supported by the filament. Hundreds of stamens or only few stamens may be found in a flower.

6 0
3 years ago
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Choose all the answers that apply
AVprozaik [17]

Answer:

The stratosphere

contains the ozone layer ,

is used by airplanes,

has strong, steady winds , and

increases in temperature as altitude increases .

Explanation:

The stratosphere is the atmospheric layer between 10 km and 50 km above the Earth's surface.

It includes the ozone layer, which is at an altitude of about 20 km.

It has strong, steady winds that can reach as high as 220 km/h.

Passenger aircraft generally fly in the lower levels of the stratosphere, at altitudes of about 10 km to 12 km.

Temperatures increase with altitude, from -50 °C at 10 km to -3 °C at 50 km.

A is wrong. The mesosphere (altitude 50 km to 85 km) is the coldest of the atmospheric layers, with temperatures as low as -90 °C at 85 km.

7 0
3 years ago
First, describe why an animal is considered a system. Then, explain why an animal is not considered a technological system. ▲
vaieri [72.5K]
A system is a group of organs that work together and provide an organism with an advantage for survival. It is the most complex organization in your body and the final level of the progression from cells to tissues to organs and then systems.
8 0
3 years ago
Glucose is broken down in the cytoplasm of the cell. What is<br> this process called?
IrinaK [193]

Answer:

glycolysis hope this helps <3

Explanation:

In stage one, glucose is broken down in the cytoplasm of the cell in a process called glycolysis. In stage two, the pyruvate molecules are transported into the mitochondria

7 0
3 years ago
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6 0
2 years ago
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