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Ch. 24 Test Review
Biology: Introduction to Animals
Question | Answer |
---|---|
Have no body cavity and include flatworms... | Acoelomates |
Have a fluid filled body cavity which is partially lined with mesoderm and includes roundworms... | Pseudocoelomates |
Have a fluid filled cavity which is complete lined with mesoderm and includes humans... | Coelomates |
Most animals reproduce... | Sexually |
Animal species which produce both sperm and egg... | Hermaphrodites |
Germ layer which gives rise to the digestive tract... | Endoderm |
Germ layer which gives rise to muscles... | Mesoderm |
Germ layer which gives rise to nervous tissue and skin... | Ectoderm |
Will not develop normally if a cell is removed, develop mouth from the first opening in the gastrula... | Protostomes |
Will develop normally if a cell is removed, develop the end of the digestive tract from the first opening in the gastrula... | Deuterostomes |
Sponges are ___; means of obtaining food... | Filter-feeders |
Capsules that hold coiled, threadlike tubes containing poison and barbs... | Nematocysts |
Fragmentation, budding and producing gemmules... | Asexual reproduction |
Polyps and medusa are two body forms of ... | Cnidarians |
ALL animals are ___ | Eukaryotic heterotrophs |
Phylum which classifies sponges... | Porifera |
Formed at the time of fertilization... | Zygote |
Consists of two layers of cells with one opening... | Gastrula |
Formed after the first mitotic division... | Embryo |
Developing animal when it is a fluid-filled ball of cells... | Blastula |
Under surface of an organism is called the ___ surface... | Ventral |
The back side, along the spine, of an organism is called the ___ surface... | Dorsal |
Cnidarians evolved directly from ___ | Multicellular choanoflagellates |
Imaginary line that divides a body form into two parts... | Plane |
Body plan with mirror image left and right portions... | Bilateral symmetry |
Hard outer covering that provides support to some animals... | Exoskeleton |
Attached to and stay in once place... | Sessile |
Body plan arranged around a central point.. | Radial symmetry |
Having no balance to the body plan... | Asymmetry |
Most animals are ___, do not have a backbone... | Invertebrates |
Diverse group of unicellular or multicellular eukaryotes that lack complex organ systems and live in moist environments... | Protists |
Body ___ allow animals to live in numerous habitats... | Variations |
Classifies new species based on evolutionary relationships... | Systematist |
Occurs when eggs and sperm combine outside the animal's body... | External fertilization |
As development of the gastrula continues, cells ___ or specialize into tissues... | Differentiate |
Evolutionary history of a species based on comparative relationships of structures and comparisons of modern life forms with fossils... | Phylogeny |
Tendency to concentrate nervous tissue and sensory organs at the anterior end of the animal... | Cephalization |
Head end... | Anterior |
Tail end... | Posterior |
"put together" in succession; similar parts... | Segmentation |
Sponges are the only animals without ___...` | Tissues |
To remain alive... | Survive |
Death of all members of a species or taxonomic group... | Extinction |
A substance taken from a 'Discodermia dissoluta' sponge which breaks down the nucleus in a cancer cell... | Discodermolide |
A cnidarian's mouth leads directly into it's ____... | Gastrovascular cavity |
Found in Cnidarians and conducts impulses to and from all parts of the body... | Nerve net |
Studies relationships between marine animals and their environments... | Marine ecologist |