Answer Aristotle divided animals into those with blood and those without. Carl Linnaeus created the first hierarchical biological classification for animals in 1758 with his Systema Naturae, which Jean-Baptiste Lamarck expanded into 14 phyla by 1809. In 1874, Ernst Haeckel divided the animal kingdom into the multicellular Metazoa (now synonymous with Animalia) and the Protozoa, single-celled organisms no longer considered animals. In modern times, the biological classification of animals relies on advanced techniques, such as molecular phylogenetics, which are effective at demonstrating the evolutionary relationships between animal taxa.
Animals have several characteristics that set them apart from other living things. Animals are eukaryotic and multicellular, unlike bacteria, which are prokaryotic, and unlike protists, which are eukaryotic but unicellular. Unlike plants and algae, which produce their own nutrients animals are heterotrophic, feeding on organic material and digesting it internally. With very few exceptions, animals breathe oxygen and respire aerobically. All animals are motile (able to spontaneously move their bodies) during at least part of their life cycle, but some animals, such as sponges, corals, mussels, and barnacles, later become sessile. The blastula is a stage in embryonic development that is unique to most animals, allowing cells to be differentiated into specialised tissues and organs.
Explanation:
<span>True, after getting a marriage in a family which results expansion of the members. It is not by the way of adding two people but by other relatives belong to the couple also added as a family. Or also a family can include people by its own choice because a family can afford an orphan or like these people as a choice and it depends on the attitude of the particular family.</span>
Answer:
7ways you can change the world today
1.Spend your consumer dollar wisely.
2.Know who's looking after your money (and what they're doing with it)
3.Give a percentage of your income to charity every year.
4.Give blood (and your organs, when you're done with them)
5.Avoid that #NewLandfillFeeling.
6.Use the innerwebs for good.
7.Volunteer
Explanation:
the answer would be; think and search.
