Why is the ozone layer important ?

1 answer:

5 0

The Ozone Layer's importance comes in its most vital role, providing a means of protection against the Sun's ultraviolet radiation which can normally kill skin cells, and cause cancer to human beings whilst preventing other lifeforms from existing. Ultra violet light also has been shown to bring DNA damage to many types of plants, so the Ozone layer is what allows all this to exist without the constant threat of ultra violet radiation causing significant harm.

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Polysaccharide structure can be varied by differences in ________.

Scilla [17]

Answer:

monomers of MONOSACCHARIDES

Explanation:

Polysaccharides are large molecules formed from chains of POLYMERS linked together by glyosidic bonds. <u>MONOMERS are small sub units that formed polymers, they are therefore the building block of a polysaccharides. The monomers of polysaccharides are called monosaccharid</u>es (1 sugar molecule.) when two of these are joined together they formed disaccharides (two sugars.)

Polysaccharides are fromed by joining together condensation, (loss of water molecules,) of mutiple monosaccharides units and the reversal of this to add water molecules to sepate them to monosaccharies is sugar Hydrolysis.

Example of polysaccharides are starch, glycogen cellulose

Example of monosaccharides are glucose, galactose.

Disaccharides are common table sugar, sucrose, maltose, lactose

7 0

3 years ago

A carpenter sands a wooden board until it is smooth. It this a physical change or a chemical change?

AleksandrR [38]

Physical change as no new substance is created

8 0

2 years ago

What is the difference between a gene and a chromosome?

Montano1993 [528]

Answer:

It would be B

Explanation:

Genes are segments of deoxyribonucleic acid (DNA) that contain the code for a specific protein that functions in one or more types of cells in the body. Chromosomes are structures within cells that contain a person's genes. Genes are contained in chromosomes, which are in the cell nucleus.

4 0

2 years ago

What is dna and its function in human body??

IRISSAK [1]

DNA is the genetic composition of the cells in the human body, think of it as the coding for a computer but for cells. These carry your genetic composition (blue eyes, Brown hair, tall, short blah blah blah) and traits like smart, funny, shy.
Hope that helps.

3 0

2 years ago

Nitrogen dioxide is a gas that can be generated by emissions from vehicles and factories. It can also be generated by natural so

klio [65]

Answer:

D. A brown gas produced

Explanation:

When a chemical reaction occur, there are several changes that takes place such as change in color, odor change, formation of a gas, and formation of a precipitate etcetera.

In the given chemical reaction, two colorless gas (NO and O2) react together and form brown gas (NO2). So, the change of gas from colorless to brown gas is the evidence that shows chemical reaction occurred.

Hence, the correct option is "D. A brown gas produced".

6 0

2 years ago