How much of the protein consumed by humans around the world is fish? 5 percent 20 percent 40 percent 50 percent

20 percent...i think i hope its right

Explanation:

Option B, 20 percent

Explanation:

As per FAO Fisheries, on an average nearly 1.5 billion people get 20% of their protein intake from fish. This count varies from nation to nation. People in poor low income countries relying on coastal food get 50% of their protein from fish while in countries like China the fish protein constitute 24 % of the total protein intake.

In nearby future it is estimated that the amount of fish protein intake will rise upto 40-50 % on an average.

Hence, option B is correct in current scenario.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.