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tresset_1 [31]
3 years ago
9

High levels of mercury contamination have entered the aquatic ecosystem primarily through:

Biology
1 answer:
Vika [28.1K]3 years ago
7 0

Answer: Option C.

Emissions from coal burning plants which then rain down on water ways.

Explanation:

Mercury has been found to be most serious and most common water contaminants. Mercury causes water pollution. It is released into the air and falls back in water ways. When it's get to water ways, bacteria changes it to methylmercury, if absorbed by aquatic organisms destroyed them. When consume by humans, it causes neurological disorder and kidney problem. The two major sources of Mercury contaminants in water ways are emissions from burning of coal plants and waste incinerators.

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inysia [295]

The missing organic compound is nucleic acids and they serve as information system of living cells.

<h3>What are nucleic acids?</h3>

Nucleic acids are organic compounds which are essential to cell  asthey serve as information storage molecules of the cell.

Nucleic acids are found in cells in the form of DNA and RNA.

Therefore, the missing organic compound is nucleic acids and they serve as information system of living cells.

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6 0
3 years ago
Complete the passage to differentiate the three types of neurons.
pogonyaev

Answer:

The correct answer will be-

1. Sensory neurons

2. Interneurons

3. Motor neurons

Explanation:

The neurons are the building blocks of the nervous system which transmits the signals in the form of electrical impulse.

The neurons can be categorized on the basis of their functions into three types:  

1. Sensory neuron- The neuron which transmits the signals from the sense organs of the body to the central nervous system.

2. Interneurons- The neuron which connects the sensory neuron to the motor neuron by interpreting the signals from the sensory neurons.

3. Motor neuron- the neuron which transmits the signal from the central nervous system to the muscles and causes the movement of the muscles.

7 0
3 years ago
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Troyanec [42]
C is the correct answer
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29. Nutrients that are not used as building blocks
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Answer:

(2) cell respiration

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Electrons move around the outside of a nucleus of an atom

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