Animals
Free cute Animals coloring pages for kids and adults. Animals are creatures of many varieties that live with humans.Coloring them can be quite fun and instructive.We have searched for you the coloring pages of many creatures that are wild and tame.
You can find many animal coloring pages in the main categories. Now let's get some information: There are many characteristic differences that distinguish animals from other living things. Animals are eukaryotic and multicellular. Many animals thrive by using the energy of sunlight indirectly. Unlike animals, plants use this light directly to produce simple sugars by photosynthesis. This distinguishes them from bacteria and protozoa. Heterotrophs (exogenous), their inability to produce their own food distinguishes them from plants and algae. The lack of rigidity of their cell walls also distinguishes them from plants, algae and fungi. Animals are mobile except for some life stages. Many animal species go through the blastula stage in the embryo stage, which is an animal-specific stage. The first fossils that could represent animals appear in the 665-million-year-old rocks of the Trezona Formation in South Australia. These fossils are most likely interpreted as early sponges. The oldest animals are found in the Ediacaran fauna towards the end of the Precambrian, about 610 million years ago. Whether these creatures belong to animals has long been doubted. But the discovery of animal lipid cholesterol in Dickinsonia fossils reveals that they were indeed animals. Animals are thought to have arisen under low-oxygen conditions, suggesting that they can live entirely through anaerobic respiration, but become completely dependent on the oxygen in their environment as they become specialized for aerobic metabolism. More than 1.5 million animal species have been described, of which about 1 million are insects, but it is estimated that there are more than 7 million animal species with undescribed ones.
