The correct statement regarding the counter current exchange in fish gills are It is a very efficient way to capture oxygen from water, Water flows across the lamellae in the opposite direction of blood flow, Oxygen diffuses into the capillaries across the lamellae, because even as oxygen is depleted, it is still at higher concentration than in the Inflowing blood
Gills are used by fish to exchange gas. Gills have a lot of folds, which increases their surface area. They can extract oxygen at a rate that is three times faster than that of a human because the water flows past their gills in the opposite direction from the blood (this is known as countercurrent flow). Blood always flows close to water that has given up less oxygen due to the fact that it moves in the opposite direction of the water. In this manner, the blood is able to take in more and more oxygen as it flows. Even as the blood, which is about 80% oxygenated, travels to the lamella's conclusion, it passes water, which is at the lamella's beginning and is 90% oxygenated.Even as the blood, which is around 80% oxygen-saturated, approaches the lamella's end, it is passing water, which is 90–100% oxygen-saturated at the lamella's beginning. Because there is still a concentration gradient, the blood can continue to receive oxygen from the water even after it is highly saturated and has passed through most of the lamellae.
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Explanation:
The theory of uniformatrianism was proposed by James Hutton, a Scottish Geologist by profession.
This theory was a contrast proponent to the tenets of the theory of catastrophism in existence before then in the scientific circles
The theory states that "the present is the key to the past and geologic processes occurring today have happened in the times past".
- The theory correlates geologic processes as continuous in nature rather can punctuated situations.
- Erosion occurring today has been changing the land surface on earth as far back into the geologic times and periods.
- From the image, the erosional activities are still continuing today.
The removal of salts and minerals from a target substance
This is possible because of the length of the protein. It is always possible to add more amino acids and synthesize new protein and every new addition increases the number of possibilities drastically.
Dioxy-ribo nucleic acid/dna