Do reptiles lay eggs or give birth
What dinosaur eggs look like
Whales are among the most striking and mysterious animals in the animal kingdom. Their deep-sea, as well as shallow-water world remains largely unexplored, so there are many unknowns regarding how they live, share, learn, and so on. As well as the question as to how whales sleep.
It is important to know that whales are not fish. They are cetaceans, mammals that develop placenta, they have lungs, therefore, they need to breathe oxygen to live, and, in addition, the environment in which they live is water.
So they are part of a group of animals of a great complexity, as well as of a recognized intelligence. There is a lot of research on this aspect, which is expressed in communication, among other ways, through the structured, specific sounds they emit; in addition to their hunting strategies, care and, in general, social life.
Breathing in cetaceans occurs according to the need of each animal. That is, they go to the surface to breathe when their reserves are already low. In whales this happens after about fifty minutes.
Tyrannosaurus rex egg
The first named oospecies was Oolithes bathonicae , a name tentatively given by Professor J. Buckman to a group of eggs that Buckman believed had been laid by a teleosaur. However, modern scientists no longer believe it is possible to determine what type of reptile laid these eggs.  In 1859, the first scientifically documented dinosaur egg fossils were discovered in southern France by a Catholic priest and amateur naturalist named Father Jean-Jacques Poech , however, he thought they were laid by giant birds. In 1859, the first scientifically documented dinosaur egg fossils were discovered in the south of France by a Catholic priest and amateur naturalist named Father Jean-Jacques Poech .
Eggs laid by invertebrate animals are known from the fossil record. Among these are eggs laid by ancient cephalopods . Eggs laid by ammonoids are the best known cephalopod egg fossils. The best preserved fossil ammonoid eggs were preserved in the Jurassic Kimmeridge Clay of England . However, the fossil record of cephalopod eggs is sparse because their soft, gelatinous eggs decompose rapidly and have little chance of fossilizing. Another important group of Mesozoic cephalopods, the belemnoids, have no documented eggs in the fossil record, although this may be due to scientists' failure to look for them adequately rather than to an actual absence in the fossil record. The fossil record is also poorly documented.[4
Because dinosaurs laid eggs
On the other hand, amphibians are not classified as aquatic animals because they do not need a habitat for aquatic life. Most amphibians begin their life stage in water, like tadpoles, but as they grow older they have a terrestrial life that returns to water only to mate.
Terrestrial animals are those animals that live mainly on land such as dogs, lions, lizards, etc. Their physiognomy is adapted to terrestrial life and, depending on their biome, they can crawl, jump, walk, etc.
There are characteristics by which we recognize animals: they are multicellular, they obtain energy for life by eating other organisms, and they can move and sense their environment, but these do not define an animal.
There are many different types of animals and all animals in the world belong to one of them. For ease of organization, animals can be divided into two major groups: vertebrate and invertebrate animals.
Within the two main groups of animals mentioned above are the types of animals grouped into: amphibians, arachnids, birds, felines, insects, mammals, fish and reptiles:
Starting from a critique of anthropology and the so-called ethnoscience, this article shows the case of the Ashaninka of the central Peruvian Amazon, who have developed various levels of classification of forest animals. Thus, in this sociocultural system, prototypical nomenclatures coexist with classification systems closely linked to the cosmological system of this society.
Based on a critique of anthropology and ethnoscience, this article shows that in the Ashaninka's case, there is a coexistence of different classification systems of forest's animals. This exposition shows that prototypical nomenclature coexists with other classification systems that bear a strong relation with Ashaninka's cosmology.
2The Ashaninka people are a group of horticulturalists, hunters, fishermen and gatherers of the Arawak family in its Maipurean branch and are found in the region of the headwaters of the Ucayali River, which includes the Perené, Ene, Tambo, Pichis, Pachitea, Urubamba rivers and the interfluvial region of the Gran Pajonal. Thus, the traditional territory of this group includes a sector of the Ucayali varcea, the Andean foothills and interfluvial terra firme zones, being predominantly hilly.