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Art [367]
3 years ago
11

By scratching a mineral with various substances, scientists are able to determine the mineral's

Biology
1 answer:
svlad2 [7]3 years ago
5 0
Hardness. You can either scratch it or use another known mineral or object to see if it becomes scratched. 
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What is the name of the membrane surrounding the brain? What is the<br> function of this membrane?
wlad13 [49]

Answer and explanation:

The meninges

There are actually 3 parts—dura mater, arachnoid, and pia mater.

The brain is soft and mushy, and without structural support it would not be able to maintain its normal shape. In fact, a brain taken out of the head and not properly suspended (e.g., in saline solution) can tear simply due to the effects of gravity. While the bone of the skull and spine provide most of the safeguarding and structural support for the central nervous system (CNS), alone it isn't quite enough to fully protect the CNS. The meninges help to anchor the CNS in place to keep, for example, the brain from moving around within the skull. They also contain cerebrospinal fluid (CSF), which acts as a cushion for the brain and provides a solution in which the brain is suspended, allowing it to preserve its shape.

The outermost layer of the meninges is the dura mater, which literally means "hard mother." The dura is thick and tough; one side of it attaches to the skull and the other adheres to the next meningeal layer, the arachnoid mater. The dura provides the brain and spinal cord with an extra protective layer, helps to keep the CNS from being jostled around by fastening it to the skull or vertebral column, and supplies a complex system of veinous drainage through which blood can leave the brain.

The arachnoid gets its name because it has the consistency and appearance of a spider web. It is much less substantial than the dura, and stretches like a cobweb between the dura and pia mater. By connecting the pia to the dura, the arachnoid helps to keep the brain in place in the skull. Between the arachnoid and the pia there is also an area known as the subarachnoid space, which is filled with CSF. The arachnoid serves as an additional barrier to isolate the CNS from the rest of the body, acting in a manner similar to the blood-brain barrier by keeping fluids, toxins, etc. out of the brain.

6 0
3 years ago
Decomposers are important because they​
eimsori [14]

Answer:

Decomposers and scavengers break down dead plants and animals. They also break down the waste of other organisms. Decomposers are very important for any ecosystem because if they weren't in the ecosystem, the plants would not get essential nutrients, and dead matter and waste would pile up.

Explanation:

8 0
3 years ago
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Which cellular process takes place in the ribosome that are bound to the endoplasmic reticulum
Novosadov [1.4K]
Actually no cellular process takes place IN the ribosomes. 
<span>But proteins are made ON the ribosomes. </span>

<span>And if it's the ribosomes associated with ER, then the proteins are going to be distributed to some other organelle in the cell or exported out of the cell.</span>
8 0
3 years ago
How are wetlands and aquifers related
Paladinen [302]
Both of them are a wet, damp environment!
Have nice day!
:D
4 0
3 years ago
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Which type of cell has a large, central vacuole that controls water pressure?
denis-greek [22]
Option b is right answer.
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3 years ago
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