Biology: Introduction to Animals
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Have no body cavity and include flatworms... | Acoelomates
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| Have a fluid filled body cavity which is partially lined with mesoderm and includes roundworms... | Pseudocoelomates
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| Have a fluid filled cavity which is complete lined with mesoderm and includes humans... | Coelomates
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| Most animals reproduce... | Sexually
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| Animal species which produce both sperm and egg... | Hermaphrodites
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| Germ layer which gives rise to the digestive tract... | Endoderm
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| Germ layer which gives rise to muscles... | Mesoderm
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| Germ layer which gives rise to nervous tissue and skin... | Ectoderm
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| Will not develop normally if a cell is removed, develop mouth from the first opening in the gastrula... | Protostomes
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| Will develop normally if a cell is removed, develop the end of the digestive tract from the first opening in the gastrula... | Deuterostomes
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| Sponges are ___; means of obtaining food... | Filter-feeders
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| Capsules that hold coiled, threadlike tubes containing poison and barbs... | Nematocysts
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| Fragmentation, budding and producing gemmules... | Asexual reproduction
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| Polyps and medusa are two body forms of ... | Cnidarians
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| ALL animals are ___ | Eukaryotic heterotrophs
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| Phylum which classifies sponges... | Porifera
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| Formed at the time of fertilization... | Zygote
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| Consists of two layers of cells with one opening... | Gastrula
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| Formed after the first mitotic division... | Embryo
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| Developing animal when it is a fluid-filled ball of cells... | Blastula
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| Under surface of an organism is called the ___ surface... | Ventral
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| The back side, along the spine, of an organism is called the ___ surface... | Dorsal
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| Cnidarians evolved directly from ___ | Multicellular choanoflagellates
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| Imaginary line that divides a body form into two parts... | Plane
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| Body plan with mirror image left and right portions... | Bilateral symmetry
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| Hard outer covering that provides support to some animals... | Exoskeleton
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| Attached to and stay in once place... | Sessile
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| Body plan arranged around a central point.. | Radial symmetry
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| Having no balance to the body plan... | Asymmetry
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| Most animals are ___, do not have a backbone... | Invertebrates
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| Diverse group of unicellular or multicellular eukaryotes that lack complex organ systems and live in moist environments... | Protists
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| Body ___ allow animals to live in numerous habitats... | Variations
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| Classifies new species based on evolutionary relationships... | Systematist
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| Occurs when eggs and sperm combine outside the animal's body... | External fertilization
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| As development of the gastrula continues, cells ___ or specialize into tissues... | Differentiate
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| Evolutionary history of a species based on comparative relationships of structures and comparisons of modern life forms with fossils... | Phylogeny
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| Tendency to concentrate nervous tissue and sensory organs at the anterior end of the animal... | Cephalization
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| Head end... | Anterior
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| Tail end... | Posterior
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| "put together" in succession; similar parts... | Segmentation
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| Sponges are the only animals without ___...` | Tissues
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| To remain alive... | Survive
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| Death of all members of a species or taxonomic group... | Extinction
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| A substance taken from a 'Discodermia dissoluta' sponge which breaks down the nucleus in a cancer cell... | Discodermolide
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| A cnidarian's mouth leads directly into it's ____... | Gastrovascular cavity
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| Found in Cnidarians and conducts impulses to and from all parts of the body... | Nerve net
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| Studies relationships between marine animals and their environments... | Marine ecologist
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