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27 Cards in this Set
- Front
- Back
colonial organism
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collection of cells that are permanently associated but in which little or no integration of cell activities occurs
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aggregation
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a temporary collection of cells that comes together for a period of time and then separates
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multicellular organism
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an organism that consists of many cells that are permanently associated and integrated in their activities
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differentiation
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process in which the cells of a multicellular individual become specialized during development
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protist
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a member of the kingdom Protista
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hypha
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slender filament that is part of the body of a multicellular fungus
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septum
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in fungi, a wall-like division between cells within a hypha; wall that internally divides body segments in annelids; thick wall that divides the hearts atrium or ventricle into right and left halves
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tissue
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group of cells with a common structure and function
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organ
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collection of tissues that work together to perform a particular function
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organ system
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group of organs that function together to carry out a major activity of the body
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vascular tissue
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type of plant tissue that contains specialized cells that distribute water and other nutrients within the body of a plant
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invertebrate
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animal that lacks a backbone
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vertebrate
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animal with a backbone
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protozoan
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historic term for a heterotrophic protist
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alga
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historical term for photosynthetic protests-not accepted by all scientists
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zygospore
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diploid zygote that results from the pairing of gametes of opposite mating types
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alternation of generations
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life cycle in which a haploid gamete-producing individual (gametophyte) alternates with a diploid spore-producing individual (sporophyte)
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sporgium
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diploid phase in the type of life cycle known as alternation of generations; diploid individual that produces spores
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amoeba
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a protist that moves using flexible, cytoplasmic extensions
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pseudopodium
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animal with a body cavity located between the endoderm and the mesoderm
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diatom
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photosynthetic unicellular protist of the phylum Bacillariophyta
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zoomastigote
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unicellular, heterotrophic protist that is a member of the phylum Zoomastigina
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euglenoid
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member of the phylum Euglenophyta
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cilium
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in cells, one hair like structure in tightly packed rows that are used for movement
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plasmodium
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protist of the phylum Myxomycota; characterized by multinucleate, amoeboid appearance
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sporozoite
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one of three stages of Plasmodium that lives in mosquitoes and is injected into humans
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merozoite
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stage of the life cycle of the protist Plasmodium in which the protist divides rapidly in red blood cells and produces many more merozoites
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