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Q. What does radial symmetry means? What is the kind of symmetry found in chordates? Which are other phyla of the animal kingdom that present species with radial symmetry?
Radial symmetry means (biologically) that the animal structures are situated in a circular or radial pattern around a center point with nonexistence of sides, like left or right. An alternative type of symmetry in which structures are placed equally in the sides of a longitudinal axis is the lateral symmetry the symmetry present in human beings, for instance, Chordates present lateral symmetry. Besides cnidarians another animal phylum with species presenting secondary radial symmetry is the phylum Echinodermata, It is considered that the simplicity of poriferans does not characterize any symmetry.
What do you understand by Exoskeleton. Supporting structures of skeleton not surrounded by the body. Endoskeletal elements are secreted by an underlying epidermis and one side
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Since the availability of flu vaccine is limited, who should receive any future pandemic flu vaccine?
Multipotent SCs: are cells differentiated & form a number of other tissues, while their sources are not fetal tissue; umblical cord blood & postnatal stem cells including dental p
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1. Discuss how nursing has changed over the last two (2) decades. 2. Review and summarise the philosophy of your enrolled nurse course and its relevance to your clinical practic
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