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1 year ago

14 Answer:

Biology

1 answer:

Levart [38]1 year ago

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<u>Oxygen</u> is the most abundant element in the Earth's atmosphere.

The <u>valence</u> electrons are those found in the outermost energy level of an atom.

In the modern periodic table, elements are arranged in order of increasing atomic numbers. <u>True</u>

Elements can be classified as metals, nonmetals or metalloids. <u>True</u>

Nonmetals are good conductors of heat and electricity. <u>False</u>

Luster is a chemical property of metals. <u>True</u>

Halogens include fluorine, chlorine, bromine, iodine, and astatine. <u>True</u>

<h3>What is an element?</h3>

An element is a substance which cannot be split into simpler units by a ordinary chemical process

So therefore, Oxygen is the most abundant element in the Earth's atmosphere.

The valence electrons are those found in the outermost energy level of an atom.
In the modern periodic table, elements are arranged in order of their increasing atomic numbers True

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How does photosynthesis help to maintain the percentage of oxygen and

MatroZZZ [7]

Answer:

Humans release carbon dioxide (CO2) into the atmosphere through cellular respiration. This CO2 is used by plants during photosynthesis. During photosynthesis, plants release oxygen (O2) into the atmosphere. The oxygen is used by animals in order to carry out cellular respiration.

Explanation:

I put all I know into that so it should be right but if it isn't then I'm sorry

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2 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).

LDL is commonly known as the "bad cholesterol" and is responsible for the deposit of cholesterol in the walls of arteries, which generates atherosclerosis and can potentially lead to strokes or heart attacks because it occludes the vessels and makes it impossible for the blood to advance.

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.

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3 years ago

Is Ss recessive trait?

Sedbober [7]

When a trait is recessive, an individual must have two copies of a recessive allele to express the trait. Recessive alleles are denoted by a lowercase letter (a versus A). Only individuals with an a genotype will express a recessive trait; therefore, offspring must receive one recessive allele from each parent to exhibit a recessive trait.

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3 years ago

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Identify the tissues and write their main functions 9 to 11 carries three marks each<br>

Naily [24]

Answer: Either the cell wall or the membrane

Explanation:

The cell wall proctects the cell while the membrane forms structures inside of the cell

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2 years ago

The body system responsible for circulation of the blood, including the heart, arteries, veins and capillaries, is called the:__

Ann [662]

The body system responsible for circulation of the blood, including the heart, arteries, veins and capillaries, is called the cardiovascular system

<h3>Cardiovascular system</h3>

To supply the lungs with oxygen, the circulatory system (cardiovascular system) pumps blood from the heart. Following that, the heart pumps oxygen-rich blood through arteries to the rest of the body. Poor in oxygen blood is returned to the heart by veins to restart the circulatory system. The cardiovascular system plays a crucial role in supplying your body with oxygen and nutrients as well as removing waste. Your cardiovascular system is how your cells obtain the nutrients they require to function properly. It is crucial to take care of your heart by exercising, eating a healthy diet, and maintaining under control your blood pressure and cholesterol.

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1 year ago