according to this page here: http://www.wordplay.com/tourism/self_guided_tours/mammals/
polar bears are the main hunter of humans.
The second one seems to be servals according to the page at
http://www.tqnyc.org/NYC063281/species.htm
no they are actually the only mammals that can not jump.
Apes Humans and other mammals
I don't think there is any. Mammals have 4 legs. (some have 2) like humans!
Humans and, it is believed that dolphins also call each other by name.
Wolves hunt at midnight but they usually hunt in the very early mornings(2 am).
No not all animals have 4 feet. Humans are mammals and only have 2 feet so therefore, not all mammals have 4 feet. Some mammals don't have any legs at all. For example, the dolphin. Hope this helps :)
Bats are mammals, birds are not. Birds lay eggs, bats do not.
The Tertiary period happened after the extinction that took place during the Cretaceous period, so mammals saw a great diversification, the most notable of which was the movement from eating from trees to eating grass. Along with these mammals, birds also became the dominant animals in land ecosystems.
You say "were" (past tense), which implies that mammals existed before be no longer do. Mammals still live all over the world. In fact, we humans are mammals. If you are looking for ways in which other (non-human) animals are useful to humans, some possibilities are: 1. We use cattle and pigs for meat. 2. We keep dogs and cats as companions. 3. We can ride on the backs of horses and camels. 4. We can hitch oxen to wagons and get them to pull. 5. We can go to the zoo and be entertained by monkeys.
A cow has 2 lungs, like most mammals, including humans. They are located in the chest cavity and play a vital role in the respiratory system by taking in oxygen and expelling carbon dioxide.
The horses' heart is 2-3 times larger then the humans heart. although They aren't that different besides size. They are both mammals and all mammals have a heart that works exactly the same (besides size).
Fish are cold-blooded, have scales over their skin, have laterally flattened bodied, are finned, require immersion in water to survive, and reproduce by laying eggs. Mammals are warm-blooded,have hair over their skin, are mostly four-limbed in the body forms, breath air but some live in water, and reproduce by carrying their young inside the female body until they are born alive. Most mammals care for their young, while most fish do not.