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Because small animals are relatively weak and cute, people have a feeling of wanting to protect, and humans are sympathetic
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Because the small size of the animal will arouse the desire of people to take care of the weak, plus the large and bright eyes of the small animal are really cute.
Cute little white.
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1. Biological evolution is not getting smaller and smaller, but there is a tendency to get bigger and bigger, and it has always been like this.
2. After the extinction of the dinosaurs, the representative of large reptiles, 65 million years ago, there were no large animals like dinosaurs in the world's land animals, which is related to the ecological environment on the earth. For example, plant growth is no longer as dense as in the Mesozoic Era, the oxygen content in the atmosphere is reduced, and the average temperature of the earth is reduced.
3. However, among the mammals that emerged later, there is still a trend of increasing body size. For example, the largest animal on land, the elephant, whose ancestor Archaeopteryx is the size of a pig today, the ancestor of modern whales, Archaeopteryx, was only 3 to 5 meters long when it first adapted to aquatic life. The ancestor of the primitive feline, the body size was much larger than that of today's cats.
4. Even our human ancestors, Australopithecus, were only about one meter in size.
5. The bigger the animal grows, the more it occupies the advantage of survival competition, so the animal will evolve in the direction of increasing size. This is true for both animals and plants.
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Hello! At present, if it is a single individual creature, there is no creature on the earth that will grow smaller and smaller, which is mainly related to the reproductive mode of the organism, if the monomer born is larger than the mother, this is not in line with scientific theory, maybe some unknown creatures will be found in the future, which can overturn the current human cognition.
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Elephants are the largest on land. Whales are the largest in the water.
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The largest animal, the blue whale, is the largest animal in the world. The largest land animal, the African elephant. The largest land carnivore is the polar bear.
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Hello, currently the largest animal in the world is the whale, which lives in the ocean. Whereas, the largest animal on land is the elephant, which is a mammal that lives in the grasslands. If you want to say that the largest animal produced on the earth so far, it must of course belong to the dinosaurs, and the largest of the dinosaurs should belong to the cangsaurus, which is the overlord of the ocean and is very strong.
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The largest animals on land are elephants, and the largest animals in the ocean are whales.
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Elephants are big!
But there are only three steps to putting an elephant in the fridge: open the fridge, put the elephant in, and close the fridge!
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A is correct, b, c, d can be illustrated by uniform circular motion is wrong.
Since the angular velocity is the same at all latitudes except for the north and south poles. In the Northern Hemisphere, when flying from north to south, the circle in the south is larger, that is, the longer the parallel is in the south, so the linear velocity is large, so a small linear velocity in the north is slower than the linear velocity in the south, so it deviates to the right due to inertia. The same goes for the north, from the fast place to the slow place, the speed is "ahead", and the direction of progress is also deviated to the right.
The faster the frequency of the object vibrating, the greater the amplitude, and the stronger the sound.