Hibernation helps animals survive the changing seasons. Foods that bears eat, such as berries and flowers, are much less available during cold winter months. When they hibernate, bears enter a deep sleep. ... While they sleep, the bears can survive because their bodies live off of their stored fat or food.
During hibernation, the animal’s body temperature, heart rate and breathing rate all drop to significantly lower levels. Animals do this to survive the winter because the weather is cold and food is scarce. It is advantageous because these animals can quite literally shut themselves off for weeks at a time rather than try and survive through harsh weather conditions.
While many people think bears are hibernators, they actually participate in a similar, though not exact, practice. Instead of hibernating, bears fall into a deep sleep called torpor. During torpor, heart rate and breathing rate decreases, body temperature reduces slightly and bears do not eat or release bodily waste. Bears can sleep more than 100 days without eating, drinking, or passing waste!
Bears sleep in dens that they make themselves, as well as in hollow trees, caves and dens built by other bears. A den can be built in 3–7 days, however, the timing of den building varies from bear to bear. While some bears build their dens months before hibernation season, others choose to excavate their dens.
These animals can dramatically drop their body temperature to below freezing—salty body fluids work to prevent tissue crystallization in particularly cold temperatures.
So really, animals that are true hibernators don’t actually sleep through the entire winter.
The urea produced by their fat metabolism is broken down and the nitrogen is re-used by the bear to rebuild protein.
The most specific category and level shared by humans, gorillas, and howler monkeys (from the new world) are Suborder Anthropoidea.
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What is suborder Anthropoidea?</h3>
Anthropoidea is a suborder of primates that includes humans, gorillas, and monkeys. Anthropoids are larger than prosimian primates and have flatter, more human-like faces. They also have larger brains.
Unquestionably apes, dryopithecines lived in the following Miocene. According to the conventional palaeontological theory, these Miocene apes gave rise to three new lineages in turn, one of which led to gibbons, another to big apes, and the third to humans.
However, it has long been held that the ancestors of both gibbons and orang-utans diverged from the ancestral line of the advanced Primates at an early date and that this line only later split into two groups, one of which included humans and the other of which included the gorilla and the chimpanzee; recent palaeontological evidence now tends to support this second view.
To learn more about suborder Anthropoidea, visit:
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Answer:
Mitosis is a process where a single cell divides into two identical daughter cells (cell division).
Meiosis is the process in which a single cell divides twice to form four haploid daughter cells.
I'm not sure what you're trying to ask but here are some simple definitions for mitosis and meiosis.
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