Which mammal has the greatest fold of volume expansion from birth to adulthood?

Size and weight are basically equal, and we can look directly at the weight. Most mammals.

They are very small at birth, and there is at least a gap of dozens of times compared with them in adulthood. From the current point of view, the biggest gap should be considered the panda. When the panda was born, it was about the size of a small gecko.

By the time you reach adulthood, the difference in multiples may be in the thousands. However, this is a comparison from common mammals, and it cannot be said that the panda is necessarily the largest multiple.

1. The largest mammal on land should be the elephant. Neither a tiger nor a lion can be compared in size to an elephant. Generally adult African elephants.

The average body length is 6 meters, and the weight is about 4 tons and kilograms. However, when the African elephant is young, it can weigh up to 100 kilograms, so the overall multiple is not very large. For example, lions and tigers weigh about 200-300 kilograms as adults, but their cubs weigh two or three kilograms when they are just born, so the overall multiple is only a few.

Ten or hundred, and not particularly exaggerated.

2. The blue whale can be regarded as the largest mammal in the ocean, and it can even be said to be the largest mammal in the world. The average adult blue whale can weigh about 160 tons, which is almost unimaginable. However, blue whales are so big, and their offspring will not be small.

Generally, when a blue whale is born, it already weighs several tons. Therefore, the increase in multiples is not as much as imagined, only dozens of times.

3. BearsFrom the perspective of mammals, newborn bears should be the smallest in weight. Take the polar bear.

For example, the newborn is about six or seven hundred grams, and the adult can reach four or five hundred kilograms, a difference of several hundred times. Polar bears are not the biggest gap, with newborn pandas weighing only 80 to 200 grams, while adult pandas weigh around 100 kilograms. In this comparison, the difference between panda cubs and adults is thousands of times.

Judging by this multiple, the largest weight difference among mammals should be pandas.

Giant panda bar, giant panda cubs are about 10 centimeters long, the average weight is about 100 grams, the average body length of adult giant pandas is about meters, the average weight is 100 kilograms, and the volume has expanded by 1,000 times.

Speaking of the largest mammal on land, I believe everyone is familiar with it, it is the elephant, to be precise, the African elephant. The average body length of an adult African elephant is about 100 kilograms (excluding the tail) and the average weight is about 4 tons, while the newborn African elephant weighs about 100 kilograms and is about 1 meter long. From birth to adulthood, African elephants have increased their weight by 40 times and their body length has doubled.

This is about to mention our national treasure giant panda, the average body length of adult giant pandas is about 100 meters, and the weight is about 100 kilograms, but the newborn red panda is only 10 centimeters long and weighs only 100 grams, compared with adult giant pandas, the body length has increased by 15 times, and the weight has increased by 1000 times.

Kangaroo. More than 10,000 times. Kangaroo.

Rodents are the most diverse group of mammals and the most widely distributed mammals, with about 2,000 species worldwide. The total number of mammal species is less than 6,000. Rodent species account for more than 40% of the total number of mammals.

Rodents include a variety of squirrels, chipmunks, jerboas, guinea pigs, hamsters, house mice, beavers, porcupines, groundhogs, etc. Insecta is the most diverse, largest and most widely distributed group in the animal kingdom It is known that there are more than 1 million species of insects on the earth, accounting for about 2 3 Insects belong to the animal kingdom and the phylum Arthropods Therefore, the most diverse, largest and most widely distributed animal group in the animal kingdom is arthropods;

Among the mammals, the largest is the blue whale.

The average head-to-body length of adult blue whale males is 25m and that of females is 27m. The longest specimen length confirmed after the fissure. It is the largest living animal in the world.

Blue whales have a slender body with a blue-gray back with light-colored spots, and the belly is often covered with microorganisms and has a yellowish color. The head is broad and flattened, with a chevron spot on the top of the head behind the breathing hole, sometimes the boundary between the head and the body that changes color.

The abdomen of a blue whale has 50-180 folds that extend from the chin to beyond the navel and can both expand and contract. The flippers are long and blunt. The dorsal fin is relatively small and is located about three-quarters of the way back from the snout.

The broad caudal lobe has a relatively straight posterior margin and a significant notch.

Introduction to mammals

Mammals are the animals with the highest morphological structure and the most complete physiology in the animal world. Compared to other animals, the most prominent feature of mammals is that they are viviparous and their young are fed with milk secreted by their mothers. Mammals have fur to keep their body temperature constant and adapt to a variety of complex living environments.

The mammaculous animal has a well-developed brain, so it can produce more complex behaviors than other animals, and can constantly change its behavior to adapt to changes in the external environment. There are more than 4,000 species of mammals in the world, and although they are all highly evolved, they still have a lot in common.

Blue whale. The largest mammal living on Earth is the blue whale.

The blue whale is a marine mammal that belongs to the suborder Baleen Whales. There are four subspecies. The blue whale is huge, reaching a length of up to 33 meters and weighing 181 tons, making it the largest and largest mammal living on Earth.

The blue whale is also believed to be the largest animal known to have ever survived on Earth. Because some dinosaurs may have been longer than blue whales, but they were far inferior in size and weight to blue whales. Blue whale.

Mammals are homeothermic, vertebrate, hairy, mostly viviparous, and rely on mammary glands to feed their offspring.

The largest mammal on Earth is the Blue Whale.

A female whale caught in the waters of South Georgia in 1947, measuring 190 meters long and weighing 190 tons. According to statistics, the number of blue whales is less than 50, and it is on the verge of extinction. Humanity should be protected.

Through analysis, it can be seen that due to the complex terrestrial environment, terrestrial animals also generally have developed sensory organs and nervous systems, which can respond to the changing environment in a timely manner, so mammals have highly developed sensory organs and nervous systems, can sensitively perceive changes in the external environment, and respond to the complex and changeable environment in a timely manner

So the answer is: sensory organs; nervous system