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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 are eukaryotic organisms that do not fit into the plant, animal, or fungal kingdoms. They exhibit a wide range of diversity in terms of size, shape, and habitat. Many protists are unicellular, but there are also multicellular protists like algae.
Any living organism, including plants, animals, fungi, protists, and bacteria, can be classified into different taxonomic groups based on their shared characteristics. Classification systems help to organize and understand the diversity of life on Earth.
Protists affect the Earth's heating and cooling system through processes like photosynthesis and carbon sequestration. Photosynthetic protists, like algae, help cool the Earth by absorbing carbon dioxide and releasing oxygen. Additionally, some protists play a role in regulating nutrient cycles that influence the Earth's climate.
Dinoflagellates are unicellular protists which exhibit a great diversity of form. Protists refer to the very first organisms on the Earth.
The smallest protists are typically single-celled organisms known as picoplankton. These tiny protists can be as small as 0.2 micrometers in size, making them some of the smallest eukaryotic organisms on Earth.
Probably photosynthetic multicellular protists, such as Rhodophyta and Chlorophyta.
an unborn animal is the youngest
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.
the first animal on the earth is a Dinosaur's