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o-na [289]
3 years ago
12

The cuticle, cortex, and medulla are regions of the hair, can you describe how they are arranged?

Biology
1 answer:
Andrei [34K]3 years ago
3 0

Answer:

The cuticle is the hair's protective layer, the cortex forms the pigment of the hair, the health of the cortex depends on the cuticle protecting it while the medulla is the innermost of the hair.

Explanation:

The cuticle is the hair outermost layer, the cortex is the middle structure for strength while medulla is the inner most.

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Why is the force of friction between two blocks reduced by adding dishwashing liquid between them?
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Answer:

The force of friction is reduced between the blocks by adding the dishwashing liquid because the liquid is slippery and this makes it difficult for the two surfaces to contact each other directly. Therefore the blocks slip past each other rather than grinding against each other, producing less friction.

Explanation:

Hope This Helps :P

3 0
2 years ago
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In an ecosystem how are animals connected?
aivan3 [116]

Answer:

A. the food web

Explanation:

Ecosystems have lots of different living organisms that interact with each other. The living organisms in an ecosystem can be divided into three categories: producers, consumers and decomposes. They are all important parts of an ecosystem. Producers are the green plants.

8 0
3 years ago
If a person has a diet high in saturated fats, _________ molecules can carry cholesterol from the liver to cells and to the arte
leonid [27]

Answer:

If a person has a diet high in saturated fats, LDL cholesterol molecules can carry cholesterol from the liver to cells and to the arterial walls whereas HDL cholesterol transports cholesterol from the cells to the liver where it is converted to bile salts which can modulate cardiovascular function.

Explanation:

Cholesterol is a lipid generated in the liver that is used to make hormones and vitamin D, but can also be ingested when eating fats.

Cholesterol can be divided into two types: LDL (low-density lipoprotein) and HDL (high-density lipoprotein).

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HDL is also called "good cholesterol" because it takes the cholesterol from the cells to the liver where it'll serve a good cause, instead of blocking the arteries.

To reduce the amount of LDL, it's best to limit the consumption of fatty meats, dairy products and other saturated fats. Foods with a good amount of HDL are those with unsaturated fats, like fish, nuts and seeds.

4 0
3 years ago
?????? help ????????!!!!!!
alexira [117]

Answer:

2 and 4

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6 0
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The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-Saharan Africa than among those o
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Ans.

Sickle-cell disorder shows defected red blood cells, due to mutation in gene that code for hemoglobin. The mutated genes for sickle-cell disease are found in higher percentage of sub-Saharan African population as it provides protection against malaria as compared to population of United States.

Malaria is common in sub-Saharan Africa region and there, natural selection favored gene for sickle cells, because it might be beneficial to people having sickle cell disease that makes them able to survive in such condition and transmit their genes to offspring.

On the other hand, in those Africans, who moved to United States, where malaria is uncommon or absent, natural selection favored normal, wild type genes, resulting in fewer people with defected sickle cell.

Thus, the evolutionary process behind this is 'natural selection.'

5 0
3 years ago
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