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dimulka [17.4K]
3 years ago
14

Coal is the biggest source of electricity production. Discuss some of the effects of coal mining and use for power? How can you

reduce the amount of coal used for electricity production?
Biology
1 answer:
Andrei [34K]3 years ago
3 0

The most significant uses of coal are in electricity generation, steel production, cement manufacturing and as a liquid fuel. Steam coal - also known as thermal coal - is mainly used in power generation.


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8. A scoop of ammonium nitrate is added to a beaker of water. Which is a quantitative observation of the experiment?
BaLLatris [955]

The correct answer is B. The temperature of the water decreased by 5°C

Explanation:

Temperature and the changes in it are part of quantitative observations because these can only be measured and understood through numbers. Indeed, the temperature is globally measured through different numerical scales such as the Celsius or the Kelvin scale. This does not occur in other qualities such as color because this is considered and analyzing using qualities or traits rather than values. According to this, the correct answer is "The temperature of the water decreased by 5°C."

8 0
3 years ago
How does the immune system function?
professor190 [17]

Answer:

Immune system of the body helps in fighting with the infectious agents that are foreign for the body. So the immune system protects us from infection.

When any foreign substance(antigen) comes in the body B-lymphocyte recognize it by binding the antigen through its receptor. After recognizing the antigen, B cell divides into antibody-producing plasma cell and memory cell.

Antibodies produced by plasma cells help in destroying the antigen by getting the antigen recognized by phagocytic cells or by complement activation.

B cells are antigen-presenting cell which present antigen to T cell and then T cell activates and produce chemicals that kill the antigen. Therefore the immune system has many immune cells that activate when an antigen comes in the body. This is how the immune system functions.

3 0
3 years ago
Leela is a 16 year old girl free complaint of tiredness and loss of appetite shows unable to concentrate at 4:00 p.m. Thailand a
VLD [36.1K]

Answer:

-Malnutrition ( undernutrition)

Malnutrition  is a condition in which an individual meal contains principally of a particular  class of food, while other classes  are deficient. In this case, Leela ,should be  have consumed too much  rice,CHO( Thailand is associated with high rice production) with less protein and other nutrients .These therefore affects her nutritional and electrolyte balance.

A well balanced diet  which contains all  the needed classes of food in correct proportion should be taken,

6 0
3 years ago
Which of the following statements explains how N-formylmethionine (fMet) is only associated with the 5' AUG initiation codon and
Scilla [17]

Answer:

  • Only fMet-tRNA(fMet) can bind first to the P site in the ribosome. ( A )
  • There are more than one tRNA with the 5' CAU 3' anticodon. ( B )
  • The N-formyl group attached to methionine prevents fMet from entering  interior positions in a polypeptide. ( D )

Explanation:

The statements that explains how N--formyl methionine (fMet) is only associated with the 5' AUG initiation codon and not with internal AUG codons, given that methionine in both cases in encoded by an AUG in the mRNA are :

Only fMet-tRNA(fMet) can bind first to the P site in the ribosome. ( A )

There are more than one tRNA with the 5' CAU 3' anticodon. ( B )

The N-formyl group attached to methionine prevents fMet from entering  interior positions in a polypeptide. ( D )

While statement C is wrong.

6 0
3 years ago
Please help me I will give 20 points
Nikolay [14]

A, bacterial conjugation

Explanation:

I think it's this because in step 4, the things under the oval-ish circle looks like bacteria

7 0
3 years ago
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