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Mammals
The world is home to 4260 named species of mammals. Mammals, or Mammalia are a class in the Phylum Chordata and the Subphylum Vertebrata. An animal is a mammal if, providing it is female, it can produce milk to feed its young.
2,954 Questions
Mammals lived on earth for how many years?
Around 70 million years, near the end of the age of the dinosaurs. There are fossils of marsupials 125 million years old, and therapsids (mammal-like reptiles) existed in the Triassic, 200 million years ago.
Do mammals only live in water?
BECAUSE THEY WERE BORN LIKE THAT !
lmfaooo. no I'm kidding.. i don't know how. I'm not a genius here..
but their gills let them that's one (:
Note: No mammal has gills after birth. They have an enhanced lung capacity, like whales, seals, polar bears, etc, that lets them hold their breath longer than other mammals can. They also tend to have a lot of blubber and protective fur, that allows them to survive the frigid temperatures of most aquatic habitats.
Those animals that live in the water 24/7-- meaning that they never venture onto land, the way otters, beavers, etc, can-- are only able to sleep by 'turning off' portions of their brain at a time. A part of them rests, another part remains active and awake so that they don't sink below the surface and drown.
Why are mammals able to live in almost every possible environment on earth?
Mammals can live on almost every environment on earth because they have the ability to maintain a constant body temperature. Babies have a high survival rate because they stay with the parents for protection.
No way Jose. It's an avian which doesn't provide milk to it's young and delivers it's Children via eggs.
Why are certain organisms scuh as mammals regarded as warm blooded?
I think it's because the way our body is formed from the so called, "First humans" on earth. and by that, the first humans have to be warm blooded to keep warm. they didn't have lots of shelter, and so they had to be warm. They did have hair, but they needed more than that. That's how our body works. But it is not important that mammals have to be warm blooded.
It's considered a mammal (generally) because it has hair, mammary glands (nurses it's young), and is warmblooded (keeps a high body temperature).
Remember, classifications for animals were created by humans. You're going to have some of Darwin's oddities fall through the cracks.
The platypus, along with the echidna, fall into their own special group among mammals. They are called monotremes.
Why are great white sharks endagered?
Found in all temperate seas, the white shark is in no danger of extinction. But their numbers seem to have been declining in some areas, as fishermen kill them on occasion, and commercial hunters take them for the fins, from which shark's fin soup is made. This happens to almost all sharks.
Why do birds and mammals lay only a few young at a time?
These animals use two different methods of insuring that enough of their offspring survive to reach maturity and reproduce.
Most fish produce large numbers of offspring that are often left to fend for themselves.
Mammals care for and protect their young. They can have fewer offspring because the parents invest more time energy and often training to insure a higher survival
rate.
Realize that some fish care for their egg and offspring and some mammals care for their offspring for very little time, relying on increased maturity at birth to increase
survival rates.
What reptile group is thought to be the ancestors of mammals?
Synapsids were reptiles that had a hole in each temporal region, eventually giving rise to modern mammals.
What are the ancestors of mammals?
Its a dinosaur
Answer:
The origin of turtles is still pretty much a mystery. The earliest turtles were aroud some 200 million years ago. Two theories are presented:
* Turtles are members of an ancient group of reptiles called Parareptilia. They are the only survivors of this group * The other theory is that the turtles evolved from an ancient group of animals called Diapsaida. Later offshoots of this group would become dinosaurs and their present day descendants like birds Mammals are thought to have diverted from the reptiles separately from dinosaurs some 300 million years ago in a group called theropsids.
In the above cases the mammals and turtle distant relatives were reptiles that existed more than 300 million years ago.
Are amphibians a type of mammal?
No. There are no amphibians that are mammals. Amphibians are the frogs, toads, salamanders and newts plus their kind. And none of them are mammals. Not all vertebrates are mammals, though all mammals are vertebrates. Vertebrates have backbones, and apes and whales are mammals and are vertebrates. But there are many vertebrates that are not mammals. Fish are vertebrates, and they are not mammals.
What is the rare marine mammals?
The baiji (or Chinese River Dolphin) is believed to be the rarest mammal, although lack of sightings in the wild have lead to whispers of the baiji now being extinct. Following the baiji, the Javan rhinoceros is also exceptionally rare.
How do placental mammals give birth?
Reproduction in most mammals involves internal fertilization by the male of one or more eggs in the female. Placental reproduction is used by most mammals. This means the embryo grows for a long time in the womb, with a placenta providing nourishment.
The other two delivery methods are:
1) the marsupial, where a less-developed offspring leaves the uterus through the vagina and travels to a pouch where it completes its maturation.
2) the monotreme, where the fertilized embryo is encased in an egg, as with most birds and reptiles, and develops mainly there, then hatches in a burrow where it begins to suckle on the mother.
Do all mammals have fur at some point in their lives?
Every mammal has hair or fur in some point in their life cycle, be it as an embryo, adult, or somewhere in between. Although the animal may not have hair or fur in some point in their lives (for example, the naked mole rat as an adult), they had hair or fur at some other point.
i am not really sure but it is not a mammal or an amphiibian .MAYBE IT IS A FISH
What is a kangaroo's favorite drink?
It depends upon the species of kangaroo.
Kangaroos are herbivores, primarily eating grass and other vegetation. Besides grass, they eat young shoots and tender leaves of native shrubs. They enjoy grains as well.
The source of food for Tree kangaroos is leaves, and sometimes fruit.
Smaller varieties of kangaroos such as the musky-rat kangaroo are omnivores, eating fruits, seeds, fungi insect larvae and small invertebrates such as grasshoppers and beetles.
What vertebrate mammal's name starts with either a you or an x?
xantis (a yak)
Xanclomys: a small mammal from the Paleocene of North America
What kind of dinosaurs were in the Jurassic time?
- Saurischia (theropods and sauropods)
- †Herrerasaurians (early bipedal predators)
- Theropods (all bipedal; most were carnivores)
- †Coelophysoids (Coelophysis and close relatives)
- †Ceratosaurians (Ceratosaurus and abelisaurids - the latter were important Late Cretaceous predators in southern continents)
- †Spinosauroids (long bodies; short arms; some with crocodile-like skulls and bony "sails" on their backs)
- †Carnosaurians (Allosaurus and close relatives, like Carcharodontosaurus)
- Coelurosaurians (diverse, with a range of body sizes and niches)
- †Tyrannosauroids (small to gigantic, often with reduced forelimbs)
- †Ornithomimosaurians ("ostrich-mimics"; mostly toothless; carnivores to possible herbivores)
- †Therizinosauroids (bipedal herbivores with large hand claws and small heads)
- †Oviraptorosaurians (mostly toothless; their diet and lifestyle are uncertain)
- †Dromaeosaurids (popularly known as "raptors"; bird-like carnivores)
- †Troodontids (similar to dromaeosaurids, but more lightly built)
- Avialans (flying dinosaurs, including modern birds: the only living dinosaurs)
- †Sauropodomorphs (quadrupedal herbivores with small heads, long necks and tails, and elephant-like bodies)
- †"Prosauropods" (early relatives of sauropods; small to quite large; some possibly omnivorous; bipeds and quadrupeds)
- †Sauropods (very large, usually over 15 meters long [49 ft])
- †Diplodocoids (skulls and tails elongated; teeth typically narrow and pencil-like)
- †Macronarians (boxy skulls; spoon-shaped or pencil-shaped teeth)
- †Brachiosaurids (very long necks; forelimbs longer than hindlimbs)
- †Titanosaurians (diverse; stocky, with wide hips; most common in the Late Cretaceous of southern continents)
- †Ornithischians (diverse bipedal and quadrupedal herbivores)
- †Heterodontosaurids (meter- or yard-scale herbivores or omnivores with prominent canine teeth)
- †Thyreophorans (armored dinosaurs; mostly quadrupeds)
- †Ankylosaurians (scutes as primary armor; some had club-like tails)
- †Stegosaurians (spikes and plates as primary armor)
- †Ornithopods (diverse, from meter- or yard-scale bipeds to 12-meter (39 ft) animals that could move as both bipeds and quadrupeds; evolved a method of chewing using skull flexibility and large numbers of teeth)
- †Hadrosaurids ("duckbilled dinosaurs")
- †Pachycephalosaurians ("bone-heads"; bipeds with domed or knobby growth on skulls)
- †Ceratopsians (dinosaurs with horns and frills, although most early forms had only the beginnings of these features)
What is a bird if is not a mammal?
it depends on what is your definition of bird. Mammals are warm blooded animals that keep their bodies warm with the heat produced from there metabolic reactions, so do birds. Dinosaurs have been found with feathers, does that make them a bird or reptile?
Reptiles lay eggs as do birds (and some mammals).
To clearly answer your question, birds are simply another class (aves) in the animal kingdom, just like fishes and amphibians. There are some theories as of how birds came about (the most realistic one, is that reptiles gave mammals and birds) because some reptiles (dinosaurs have been found with feathers (missing link between reptiles and birds) and some other reptiles have been found with mammal glands (missing link between reptiles and mammals).
The only other egg-laying mammal is the echidna which, like the platypus, is classified as a monotreme. There are two species of echidnas: the short-beaked echidna (Tachyglossus aculeatus) of Australia, and the long-beaked echidna (Zaglosssus bruijni) of New Guinea. There are several sub-species of the long-beaked echidna: the Western long-beaked echidna, Sir David's long-beaked echidna and the Eastern long-beaked echidna.
The Yucca Flower is the New Mexican state flower. It look something like an upside down tulip. It was selected by New Mexico schoolchildren and supported by the New Mexico Federation of Women's Clubs, was approved by the eighth regular session of the legislature of New Mexico. House Bill No. 371, naming the "Yucca flower" the "official Flower of the State of New Mexico" was adopted on March 14, 1927.
The legislation does not specify a particular species of yucca flower or even indicate that "all" species are intended to represent New Mexico.
The Yucca Flower is the New Mexico's state flower.
How do you spell mammal in English?
Cow: Moo
Horse: Neigh
Pig: Oink
Chicken: Cluck
Lion: Roar
Sheep: Baa
Snake: Hiss
Bird: Chirp
Etc.
There are just two types of egg-laying mammals. They are the platypus and the echidna.
These animals, known as monotremes, lay eggs for the purpose of reproduction. They lay eggs via sexual intercourse as all mammals do.
