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grandymaker [24]
3 years ago
8

What are the functions of veins ?

Biology
2 answers:
coldgirl [10]3 years ago
7 0

Answer:

They are veins and arteries. The primary function of arteries is to transport highly oxygenated, nutrient-rich blood from our hearts and distribute it to the rest of our body. Veins, on the other hand, are used to pump much-needed blood back to the heart.

Sergeeva-Olga [200]3 years ago
7 0

Answer:

Veins are used to pump blood back to the heart.

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Soils contain small or trace amounts of many minerals, including the chemical elements phosphorus, calcium, potassium, magnesium
serg [7]

Answer:

Magnesium, calcium, phosphorous, sulfur these are essential nutrients for plants. These are required in trace quantity but are very important for plant life. Point A. will be correct answer.

Explanation:

As in B. starch n cellulose are composed of only carbon, oxygen and hydrogen.

As in C. These elements are not required on special occasion but are necessary throughout plant life.

As in D.  C H N O  is the primary component plants need but these secondary nutrients are equally necessary for growth n structure of plant.

<u><em>So answer A. Is the correct option.</em></u>

Calcium plays the most important role in structure formation of plants. Also act as messenger molecule in signaling. Deficiency  of calcium caused wilting , weakened stem and ultimately death of plant.

Magnesium is the key element in chlorophyll molecule. It is necessary for chlorophyll formation.

Sulfur is another very important element in plant life, it is necessary for protein synthesis in plants.

Phosphorous plays an important role in  process of cell devision , photosynthesis and respiration.

Potassium is very crucial in gaseous exchange ,it operates the opening and closing of stomata.

3 0
2 years ago
What is the essence of the catalase test?
garik1379 [7]

Explanation:

Catalase test demonstrate the presence of an enzyme called catalase, that catalyses the release of oxygen from hydrogen peroxide. It is used to tell the difference between the non-catalase producing bacteria from those bacteria that produces an enzyme catalase. Catalase is produced by the bacteria that respire using oxygen. If an organism produces catalase, bubbles of oxygen are produced when hydrogen peroxide is added to it.

8 0
2 years ago
How is farming contributing to the decline in biodiversity?
seraphim [82]
The answer is B. By polluting near by streams with pesticides and herbicides
6 0
3 years ago
Read 2 more answers
Find the<br>H.C.E<br>of 42,56,70 <br>​
siniylev [52]

Answer:

Therefore,

H.C.F = 7 ans✓

6 0
2 years ago
Can i do chemical peel while taking iron, vitamin c and vitamin d
galben [10]
It would be best to ask a professional on the subject. 
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3 years ago
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