Difference between revisions of "Animal"

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-{{Taxonomy
-|image=Vulpes vulpes.jpg
-|kingdom=Animalia}}
-An '''animal''' is any creature which is a member of the [[Animalia]] kingdom. Animals must eat [[plant]]s or other organisms to survive. The plants are called "producers" and the animals are "consumers". Scientists call consumers [[heterotroph]]s. Animals have complex [[eukaryotic cell]]s, unlike bacteria which have much simpler [[prokaryote|prokaryotic]] cells.  Animal cells do not have [[cell wall]]s, only structural [[protein]]s in the [[cell membrane]]; this allows the animal cell a certain amount of flexibility.
-The simplest of all animals are [[sponge]]s, which do not move.  Sponges have different cells for different tasks, but these cells are not organized further into [[tissue]]s or [[organ]]s.  Sponges also do not exhibit [[symmetry]], unlike all other animals.
-The next simplest animals comprise a single species, which fall somewhere between sponges and all other animals.  This species, ''Trichoplax adhaerans'', is very small, yet has cells organized into different kinds of tissues, though it does not have organs.  This is an improvement on the sponge body plan.
-True Animals are grouped into a sub-kingdom called Eumetazoa.  All True Animals have tissues and organs, except for one type called Myxozoa. These have regressed to a single-celled form.
-The simplest eumetazons are the Radiata, a loose group that includes jellyfish, corals, and comb jellies.  Most of them belong in the phylum Cnidaria, except for the comb jellies, which comprise the phylum Ctenophora.  Radiatans have what is called radial symmetry, where they can be divided into two even halves in many planes, like a wheel or a circle.  All cnidarians have special cells called cnidocytes, which produce the sting.  Comb jellies have no such cells and are harmless to humans.
-==Biblical origin of animals==
-The Book of [[Genesis]] specifies both when and why [[God]] created animals.  The "when" is found in the following passage from Genesis ch. 1, which states that God created aquatic creatures and birds on the fifth day and that on the sixth day He created land animals and then man:
-{{Bible quote|And God said, Let the waters bring forth abundantly the moving creature that hath life, and fowl [that] may fly above the earth in the open firmament of heaven. And God created great whales, and every living creature that moveth, which the waters brought forth abundantly, after their kind, and every winged fowl after his kind: and God saw that [it was] good. And God blessed them, saying, Be fruitful, and multiply, and fill the waters in the seas, and let fowl multiply in the earth. And the evening and the morning were the fifth day. And God said, Let the earth bring forth the living creature after his kind, cattle, and creeping thing, and beast of the earth after his kind: and it was so. And God made the beast of the earth after his kind, and cattle after their kind, and every thing that creepeth upon the earth after his kind: and God saw that [it was] good. And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth. So God created man in his [own] image, in the image of God created he him; male and female created he them. And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth, and subdue it: and have dominion over the fish of the sea, and over the fowl of the air, and over every living thing that moveth upon the earth.|book=Genesis|chap=1|verses=20-28|version=KJV}}
-The "why" is found in the following passage from Genesis ch. 2, which states that after God had created man, He created land animals and [[birds]] in an attempt (ultimately unsuccessful) to provide one of the animals as a help meet for [[man]]:
-{{Bible quote|And the LORD God said, [It is] not good that the man should be alone; I will make him an help meet for him. And out of the ground the LORD God formed every beast of the field, and every fowl of the air; and brought [them] unto Adam to see what he would call them: and whatsoever Adam called every living creature, that [was] the name thereof. And Adam gave names to all cattle, and to the fowl of the air, and to every beast of the field; but for Adam there was not found an help meet for him.|book=Genesis|chap=2|verses=18-20|version=KJV}}
-==External Links==
-*[http://www.aim.org/wls/category/animals/ What Liberals Say - Category: Animals], [[Accuracy In Media]]
-[[Category:Animals]]

Difference between revisions of "Animal"

Revision as of 13:11, June 19, 2009

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