In my Biology 11 class we have just started studying Animals. We started covering Animal Distinctions,Characteristics, the Two Groups;Invertebrates and Vertebrates, Symmetry, and the Body Cavities of bilateral animals.
Animal Distinctions:
-Gradual Development
-Metamorphosis
-They have a variety of cells with specialized functions (highly-specialized)
Characteristics:
-Heterotroph: "An organism that cannot manufacture its own food and instead obtains its food and energy by taking in organic substances, usually plant or animal matter. All animals, protozoans, fungi, and most bacteria are heterotrophs."
-Ingest Food
-Primarily Diploid: "A cell or an organism consisting of two sets of chromosomes, usually, one set from the mother and another set from the father."
-Sexual Reproduction
-Zygote~Blastula~Gastrula
Two Groups:
-Invertebrates
-Vertebrates, Phylum:Chordata
Invertebrates:
-Without backbones
-eg. Phyla, Porifera, Cnideria, Platyhelminthes, Nematoda, Annelida, Mollusca, Anthropoda, and Echinodermata.
Vertebrates:
-With backbones
-eg. Fishes (cartilaginous, bony), amphibians, reptiles, aves (birds), and mammals.
Symmetry:
-Radial Symmetry: "Symmetrical arrangement of parts of an organism around a single main axis, so that the organism can be divided into similar halves by any plane that contains the main axis. The body plans of echinoderms, ctenophores, cnidarians, and many sponges and sea anemones show radial symmetry."
-Bilateral Symmetry: "Symmetrical arrangement of an organism or part of an organism along a central axis, so that the organism or part can be divided into two equal halves. Bilateral symmetry is a characteristic of animals that are capable of moving freely through their environments."
Body Cavities-Bilateral Animals:
-Ectoderm: outside
-Endoderm: inside
-Mesoderm: in-between
*Coelom: in the mesoderm
*Pseudocoelomates: sort of have coelom
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