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AP Bio - Chapter 32
Animal Diversity
| Question | Answer |
|---|---|
| a solid-bodied animal lacking a cavity between the gut and outer body wall | acoelomate |
| pertaining to the front, or head of a bilaterally symmetrical animal | anterior |
| the endoderm-lined cavity, formed during gastrulation, that develops into the digestive tract of an animal | archenteron |
| body symmetry in which a central longitudinal plane divides the body into two equal but opposite halves | bilateral symmetry |
| a hollow ball of cells that marks the end of the cleavage stage during early embryonic development in animals | blastula |
| a fluid or air-filled space between the digestive tract and the body wall | body cavity |
| in animals, a set of morphological and developmental traits that are integrated into a functional whole - the living animal | body plan |
| an evolutionary trend toward the concentration of sensory equipment at the anterior end of the body | cephalization |
| rapid cell divisions without significant growth during early embryonic development that converts the zygote into a ball of cells | cleavage |
| a body cavity lined by tissue derived only from mesoderm | coelom |
| an animal that possesses a true coelom (body cavity lined completely by mesoderm-derived tissue) | coelomate |
| having two germ layers | diploblastic |
| pertaining to the top of an animal with radial or bilateral symmetry | dorsal |
| the outermost of the three primary germ layers in animal embryos; gives rise to the outer covering and in some phyla, the nervous system, inner ear, and lens of the eye | ectoderm |
| the innermost of the three primary germ layers in animal embryos; lines the archenteron and gives rise to the liver, pancreas, lungs, and the lining of the digestive tract in species that have these structures | endoderm |
| an embryonic stage in animal development encompassing the formation of three layers; ectoderm, mesoderm, and endoderm | gastrula |
| in animal development, a series of cells and tissue movements in which the blastula-stage embryo folds inward, producing a three-layered embryo, the gastrula | gastrulation |
| a free-living, sexually immature form in some animal life cycles that may differ from the adult animal in morphology, nutrition, and habitat | larva |
| the middle primary germ layer in an animal embryo; develops into the notochord, the lining of the coelom, muscles, skeleton, gonads, kidneys, and most of the circulatory system | mesoderm |
| a developmental transformation that turns an animal larva into either an adult or an adult-like stage that is not yet sexually mature | metamorphosis |
| pertaining to the rear, or tail end, of a bilaterally symmetrical animal | posterior |
| an animal whose body cavity is lined by tissue derived from mesoderm and endoderm | pseudocoelomate |
| symmetry in which the body is shaped like a pie or barrel (lacking a left and right side) and can be divided into mirror-image halves by any plane through its central axis | radial symmetry |
| possessing three germ layers: the endoderm, mesoderm, and ectoderm | triplobastic |
| pertaining to the underside, or bottom of an animal with bilateral symmetry | ventral |
Created by:
mrariail