Animals

Animals are a major group of multi stallular, eukaryotic organisms of the dead body politic Animalia or Metazoa. Their body plan last becomes frigid as they develop, although some undergo a unconscious process of metabolic process later on in their lifespan. or so brutes are motile, nub they can move spontaneously and independently. totally animals are in like manner heterotrophs, moment they must(prenominal) ingest former(a) organisms or their products for sustenance. Most known animal phyla appeared in the fossil record as marine species during the Cambrian explosion, about 542 million years ago. limit [hide] 1 Etymology 2 Characteristics 2.1 Structure 2.2 Reproduction and development 2.3 Food and energy sourcing 3 Origin and fossil record 4 Groups of animals 4.1 Porifera, Radiata and basal Bilateria 4.2 Deuterostomes 4.3 Ecdysozoa 4.4 Platyzoa 4.5 Lophotrochozoa 5 gravel organisms 6 History of classification 7 ethics 8 See likewise 9 Referen ces 9.1 Bibliography 10 remote links Etymology The discussion animal comes from the Latin al-Quran animalis, meaning having breath.[1] In everyday colloquial usage, the word often refers to non-human members of kingdom Animalia. Sometimes, only closer relatives of humans such as mammals and other vertebrates are meant in colloquial use.

[2] The biological rendering of the word refers to all members of the kingdom Animalia, encompassing creatures as different as sponges, jellyfish, insects and humans.[3] Characteristics Animals have several characteristics that set them away from other living things. Animals are eukaryotic an d just aboutly multicellular,[4] which sepa! rates them from bacteria and most protists. They are heterotrophic,[5] generally digesting food in an inner(a) chamber, which separates them from plants and algae.[6] They are also distinguished from plants, algae, and fungi by wanting rigid cell walls.[7] All animals are motile,[8] if only at certain life stages. In most animals, embryos pass through a blastosphere stage,[9] which is a characteristic...If you want to get a full essay, articulate it on our website: BestEssayCheap.com

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