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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Answer:
prey and predator
Explanation:
The predator-prey relationship is one of the most common examples of coevolution. In this regard, the predator have adaptations that enable them to capture and feed on their prey. These include many have sharp claws and canine teeth, many are able to run fast and many have a body colour which matches that of the surroundings. There is an increased prey on the prey to avoid being captured by the predator and thus evolved traits to help them camouflage better.
Answer:
The meninges is a layered unit of membranous connective tissue that covers the brain and spinal cord. These coverings encase central nervous system structures so that they are not in direct contact with the bones of the spinal column or skull.
Explanation:
C. The recessive allele was hidden by the dominant allele.
The plant has the genotype ssyy. (Uncapitalized because they are recessive genes, not dominant.)
