Isn’t that wrong? Who says all animals drink fresh water all the time? Where do ocean creatures find fresh water to drink? Many animals do not need to drink water directly and can obtain water through food. The theory of evolution can explain this problem very well.
Because land animals are exposed to air, compared to creatures living in water, water from their bodies is lost more quickly through evaporation and respiration, so they must drink water. water if they don't drink. water, they will become ill, leading to fluid and electrolyte imbalance in the body and eventually death.
Land animals not only have fresh water but also salt water. Lions and tigers drink fresh water because they eat meat. Blood and meat contain many minerals, so electrolytes should be diluted with cool water. Camels and other animals living in arid areas of deserts. Animals also have the ability to drink salt water to survive. When they eat grass, they can get a certain amount of fresh water, but it cannot meet their body needs. salt tolerance. When they lack water, they may drink salt water for a while. They can't help but drink water available where you live. Likewise, there are land plants that absorb fresh water and others that tolerate salt water.
Many marine organisms do not need to drink water directly. More than 90% of the body of organisms such as jellyfish is water. Living in water, the loss of bodily fluids is relatively slow. Water can be replenished by natural osmosis. You can also replenish water through food. There is therefore no such thing as “all animals and plants drink“Always fresh water,” as the interrogator mentioned.
The way organisms absorb water and the properties of water are all acquired during the long process of evolution. The act of drinking water and absorbing minerals is to stabilize the living fluid environment formed by the cell body, so that the fluid pressure inside and outside the cells is equal, so that the cells do not become dehydrated or absorb too much water. , which will affect physiological functions. Whether organisms drink salt water or fresh water adapts to the environment they live in, which is a function of environmental selection.
Darwin's theory of evolution was based on observations of his time, and there are still flaws. However, natural selection is still an important part of the theory of biological evolution today. and the diversity of thenenvironment Sexual compatibility also illustrates the impact of the environment on organisms, which illustrates exactly the correctness of Darwin's evolutionary view of "natural selection."