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qwelly [4]
3 years ago
13

The planets in our solar system orbit around the sun.

Biology
1 answer:
My name is Ann [436]3 years ago
3 0

Answer:

Yes. The force acting on the planets is gravity.

Explanation:

The planets would be moving in straight lines, but the sun's gravity pulls them toward it. The force of gravity causes the moving planets to travel in roughly circular orbits around the sun.

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The photographs left were taken using a transmission electron microscope They show the ultrastructure of some organelles.
Nezavi [6.7K]

Answer:

True

Explanation:

The transmission electron microscope, is a potential microscope that can make bigger the objects 1 million times. The main use is to analyze metals and other materials, to observe the arrangements of the particles in it. Also some other structures as the viruses can be observed with this microscope.

When the optic microscope can not see some structures like the organelles, then it is used this kind of microscope.

It is used also to observe some organelles, membranes, and other structures.

3 0
4 years ago
When igneous rock is formed,the size of the rock crystals or grains is primarily dependent on
Vedmedyk [2.9K]

Answer:

The three factors that influence the textures of igneous rocks are the speed of cooling, the silicate content, and the water content.

Igneous rocks contain randomly arranged interlocking crystals. The size of the crystals depends on how quickly the molten magma solidified: magma that cools slowly will form an igneous rock with large crystals. lava that cools quickly will form an igneous rock with small crystals. When magma cools, crystals form because the solution is super-saturated with respect to some minerals. If the magma cools quickly, the crystals do not have much time to form, so they are very small. If the magma cools slowly, then the crystals have enough time to grow and become large.

3 0
3 years ago
Could someone pls help me?
oee [108]

mitochondria.

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7 0
3 years ago
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This is a period of time when extensive glacial ice covered much of earth, producing long-term climate change and causing the ex
iragen [17]

Answer:

ice age/ Quaternary glaciation

Explanation:

Ice ages have occurred in the earth history and do occur more or less regularly in a cycle. It is believed that ice ages are as a result of small changes in the earth's orbit and also dependent on the solar cycles. The temperatures on the earth reduce causing the ice sheets in the poles to extend to the subtropics.

5 0
4 years ago
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Name two structural characteristics that triglycerides and phospholipids have in common.
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Two structural characteristics that triglycerides and phospholipids have in common are that they are both composed of fatty acids? The fatty acids are attached to a molecule called glycerol and fatty acyl tails
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4 years ago
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