Answer:
Option (a).
Explanation:
Counter current flow may be defined as the flow of water in the opposite direction with the flow of blood in the body. This countercurrent flow is generally occurs in fishes.
The one main benefit of the countercurrent flow is the absorption of maximum oxygen as the water flows inside the body. Approximately, three time more oxygen is extracted during the counter current flow. The concentration gradient is maintained up to the whole length of gills.
Thus, the correct answer is option (a).
Answer The first practical realisation of the metric system came in 1799, during the French Revolution, when the existing system of measures
Explanation:
c removing salt and minerals
the process of desalination removes salt and minerals so water is safe to drink
A Biomass
This is because it is easily replenished naturally and over a short period of time but only if there is a large quantity of biomass available. If there is little biomass than it will be nonrenewable.
Answer:
I believe it's B.
Explanation:
Hope my answer has helped you!
Answer:
Variables that can cause the ocean water salinity to decrease include the melting of glaciers, the inflow of river water, and rainfall.
Explanation: