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Chapter 7 Vocab Words for Final
Mr. Hobbs Vocab Words for final
16
Science
7th Grade
06/13/2010

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Term
Virus
Definition
a tiny non-living particle that lives and multiplies inside a living cell, viruses aren't cells they multiply differently than other organisms, they only multiple inside a living organism's cell
Term
Host
Definition
a living thing that provides a source of energy for a virus or an organism
Term
Parasite
Definition
tiny organisms that live on or in a host and causes harm 
Term
Symbiosis
Definition
a close relationship by which at least one organism benefits
Term
Protist
Definition
Eukaryotes that cannot be classified as animals, plants, or fungi 
Term
Cilliate
Definition
second group of animal like protists they have structures like cilia that move and obtain food
Term
Ameba
Definition
these are sarcodines that live in either water or soil they feed on bacteria and smaller protists 
Term
Parramecium
Definition
cilliates that live mostly in fresh water and they feed on bacteria and smaller protists
Term
Diaotomes
Definition
unicellular protists with glass like cells walls, they are a food source for hetereotrophs and they move by oozing chemicals in the cell then blide in the slime
Term
Fungus 
Definition
a eukaryotic organism that has cell walls, uses spores to reproduce and is a hetertophic organism that feed by absorbing its food
Term
Spore
Definition

they are the reproductive structure of the fungi 

fungi usually reproduce by making spores. The lightweight spores are surrounded by a protective covering and can be carried easily through air or water to new sites.they fall wherever conditions are right for them to grow

Term
Mushroom
Definition
fungi that feed by absorbing there food and use spores to reproduce the hyphae are tightly packeted appear solid 
Term
Yeast 
Definition
uni - cellular fungi which undergo a form of asexual reproduction called budding, they grow from the body of a parents cell like a tree branch, then it breaks away and lives on its own, they are an important food source, they are used in baking because they break up the sugar in food and use it for food and produce carbon dioxide gas which forms bubbles causing the dough to rise
Term
Mold
Definition
these come from the fungus family, some molds are used to make food such as cheese, they grow in moist foods, damp trees
Term
Lichen 
Definition
flat, crusty patches that grow on tree barks or rocks, they consists of a fungus and either algae that live together in a mutualistic relationship, fungus benefit from the food produced by the algae and in turn algae gets shelter, water and minerals from the fungus
Term
Decomposer 
Definition
the process in which important nutrients return to the soil by breaking down the chemicals by fungi living in the soil, fungi play an important role as a recycler on earth by decomposing plats and animals
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