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protists
Protists
The answer to this question will depend upon your definition of 'animal'. There is a very broad 'gray area' between the protists and what we normally consider animals. One definition could be 'metazoa capable of digestion' in this case Volvox would be a good contender for the distinction. On the fifth day of this earth, birds and sea animals were created. On the sixth day of this earth, land animals were created. So the very first animal was either a bird or a sea animal.
Protists that are classified as animal-like are called protozoans and share some common traits with animals.All animal-like protists are heterotrophs. Likewise, all animal-like protists are able to move in their environment in order to find their food.Unlike, animals, however, animal-like protists are all unicellular. The are all eukaryotes.Fungus-like protists are heterotrophs with cell walls. They also reproduce by forming spores. All fungus-like protists are able to move at some point in their lives. There are essentially three types of fungus-like protists: water molds, downy mildews, and slime molds.Plant-like protists are autotrophic. They can live in soil, on the bark of trees, in fresh water, and in salt water. These protists are very important to the Earth because they produce a lot of oxygen, and most living things need oxygen to survive.Furthermore, these plant-like protists form the base of aquatic food chains. These plant-like protists can be unicellular, multicellular, or live in colonies. The plant-like protists are divided into four basic groups: euglenoids, dinoflagellates, diatoms, and algae.
Dinoflagellates are unicellular protists which exhibit a great diversity of form. Protists refer to the very first organisms on the Earth.
Protists are found in many places. They are mostly found ponds and streams, and the ocean as well. Strangely, they are found also in human and animal digestive tracts.
Probably photosynthetic multicellular protists, such as Rhodophyta and Chlorophyta.
Awkwardly worded question seeing as life evolves from generation to generation classifying something as an animal rather than an animal-like protist is rather difficult. Most scientists however, can assume that animals evolved from flagellated protists and that the most primitive animal we know of is the sponge since it has no symmetry nor true tissue.
an unborn animal is the youngest
Protists are important to the earth's ecosystems because they were the first complex life on earth, provide as a food source to many living things, and help clean large bodies of water.
The cheetah is the fastest animal on earth. This does not include animals in the air.
The biggest animal on earth is the blue whale.