458494798 | cleavage | A succession of mitotic divisions without cell growth between divisions | 0 | |
458494799 | blastula | Stage where embryo is a hollow ball of cells | 1 | |
458494800 | gastrulation | When layers of embryonic tissue that will develop into body parts are produced | 2 | |
458494801 | gastrula | Stage where one end of the embryo has folded inward, forming a pouch | 3 | |
458494802 | archenteron | Pouch formed by one end of the embryo folding inward | 4 | |
458494803 | endoderm | Lines digestive tract, develops from lining of archenteron | 5 | |
458494804 | ectoderm | Covers body surfaces | 6 | |
458494805 | mesoderm | In some animals; forms muscles and most organs | 7 | |
458494806 | diploblastic | ______________ animals - have no mesoderm. Enidarians (jellies and corals) | 8 | |
458494807 | triploblastic | ____________ animals - have mesoderm | 9 | |
458494808 | metamorphosis | Resurgence of development that transforms larva into adult | 10 | |
458494809 | Cambrian explosion | When many new animal species came to be, probably due to new predator-prey relationships | 11 | |
458494810 | grade | Group of animals that share same level of organizational complexity but not necessarily descended from a common ancestor | 12 | |
458494811 | body plan | morphological and developmental traits that define a grade | 13 | |
458494812 | radial symmetry | No head or rear end, no left or right | 14 | |
458494813 | bilateral symmetry | Two-sided symmetry | 15 | |
458494814 | dorsal | Top | 16 | |
458494815 | ventral | Bottom | 17 | |
458494816 | anterior | Toward the head | 18 | |
458494817 | posterior | Toward the tail | 19 | |
458494818 | cephalization | Central nervous system in the head | 20 | |
458494819 | coelom | Tract from outer body wall | 21 | |
458494820 | coelomates | Animals that possess a true coelom | 22 | |
458494821 | pseudocoelomates | Animals that have a body cavity formed from the blastocoels | 23 | |
458494822 | acoelomates | Animals that lack a coelom | 24 | |
458494823 | protostomes | Have spiral cleavage, determinate cleavage, blastopore opening becomes the mouth | 25 | |
458494824 | spiral cleavage | Planes of cell division are diagonal | 26 | |
458494825 | determinate cleavage | Rigidly casts the fate of embryonic cells very early | 27 | |
458494826 | deutrostomes | Have radial cleavage, indeterminate cleavage, blastopore opening becomes anus; mouth forms from secondary opening | 28 | |
458494827 | radial cleavage | Cleavage planes parallel or perpendicular | 29 | |
458494828 | indeterminate cleavage | Each cell in early development retains same capacity to develop into a complete embryo | 30 | |
458494829 | choanocytes | Flagellated cells that draw water into sponge | 31 | |
458494830 | osculum | Opening where water exits | 32 | |
458494831 | amoebocytes | Digest and distribte nutrients | 33 | |
458494832 | spicules | Skeletal needles | 34 | |
458494833 | medusa | Floating, umbrella shaped body with dangling tentacles (like jellyfish) | 35 | |
458494834 | polyp | Cylinder shaped body with rising tentacles (like sea anemone) | 36 | |
458494835 | nymphs | Young small versions of adult | 37 | |
458494836 | larvae | A distinct juvenile form many animals undergo before metamorphosis into adults | 38 | |
458494837 | pupa | The life stage of some insects undergoing transformation | 39 | |
458494838 | notochord | A dorsal, flexible rod that functions as support. Usually replaced by bone during development | 40 | |
458494839 | dorsal nerve cord | A hollow cord dorsal to the notochord | 41 | |
458494840 | pharyngeal gill slits | In embryos of chordates; become gills or disappear during development | 42 |
Chapter 32 Animal Diversity Flashcards
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