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Biology Sec. 23
9th Grade Biology Sec. 23
Question | Answer |
---|---|
Collagen | Three stranded protien, unique to animals, that combines to form strong, flexible fibers. |
Homeotic | Genes that control early devolepment in animals. |
Homeobox | Genes that define the head to tail pattern of development in early animal embryos; also call Hox genes. |
Vertebrate | Animal with an internal segmented backbone. |
Invertebrate | Animal without a backbone. |
Phylum | Group of animals defined by structural and functional characteristics that are different from every other animal phylum. |
Bilateral Symmetry | Body plan of some organisms in which the body can be divided equally along one plane. |