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tiny-mole [99]
3 years ago
10

What hardens the cell wall​

Biology
2 answers:
Ivenika [448]3 years ago
8 0
Cellulose in plant cell walls and chitin in yeast and fungi cells
Damm [24]3 years ago
4 0
Sclerenchyma. sclerenchyma is a tissue composed of sclereids and fibres that have thickened.
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If the room you are in became low in oxygen, why would you suffocate?
skad [1K]

Answer: B

Explanation:

carbon monoxide is poison and can kill you

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3 years ago
5 factors that affect weather: geographic location/latitude altitude/height above sea level, ocean currents/large lakes, winds,t
Igoryamba

The statement is - True.

The five main factors that determine the weather at a certain place are the:

- geographic location/latitude

It determines the amount of sunlight, as well as the concentration of sun rays, which directly influences the temperature.

- altitude/height above sea level

The lower the place the warmer it is, the higher the place the colder it is, it is a simple rule that applies for all places on the planet, compared with places in their surroundings.

- ocean currents/large lakes

The ocean currents can bring cold and dry or warm and wet air masses, depending on what kind of an ocean current it is. The water also contributes to a more stable weather, with more moderate temperatures because of the thermal properties of the water to cool of and warm up slower than the land.

- winds

The air masses can bring cold and dry or warm and wet weather, so they influence the temperature and precipitation of a place.

- topography

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6 0
3 years ago
The role of enzymes in photosynthesis is
r-ruslan [8.4K]
Enzymes break up the electrons of water to yield oxygen and hydrogen gas
8 0
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Which acid is used to produce chloride salt
Nata [24]

Answer:

Different acids make different salts.

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a hydrochloric acid

b sulphuric acid

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5 0
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Which molocule is used to cut out a section of dna
pshichka [43]

Answer:

Restriction enzymes (endonucleases) are used to cut the DNA into fragements.

Explanation

Restriction enzymes are obatained from bacteria where they are utilized by bacteria for protection against viruses. Restriction enzymes are used in biotechnology research. There are several restriction enzymes and each cut the DNA at specific site known as recognition site which is usually 4-8 neucleotide long. They produce sticky ends (cutting the both DNA strand on different site) and blunt ends (cutting the both DNA strand on same site) on DNA fragments.

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