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lifeScience
L-S Vocab
24
Science
7th Grade
10/03/2011

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Term
Xylem
Definition
Vascular tissue in which water and nutrients move in certain plants.
Term
Cells
Definition
The most basic level in an organism, makes up tissues and organs
Term
Aristotle
Definition
The first scientist to classify animals based on movement.
Term
Prokaryote
Definition
A cell without a nucleus, e.g. Bacteria.
Term
Pseudopodia
Definition
A “false foot” in which single celled organisms use to move and eat. It is an extension of the cell membrane.
Term
Dichotomous key
Definition
A two-part graph-like key that describes animals based on appearance.
Term
Tissues
Definition
The second level in organisms, which make up organs. They are made up of millions of cells.
Term
Phloem
Definition
Vascular tissue in some plants which transports food.
Term
John Ray
Definition
The scientist who classified animals based on the internal organ structure.
Term
Autotroph
Definition
A single or multi celled organism that produces its own food.
Term
Streptococcus
Definition
The pathogen that causes strep throat.
Term
Epidermis
Definition
The outer layer of skin.
Term
Linnaeus
Definition
The scientist who classified organisms using two names, both latin
Term
Heterotrophs
Definition
Organisms multi or single celled which depend on other organisms for food.
Term
Binomial Nomenclature
Definition
The scientific name for creatures, which is in two parts, a genus and the species. (e.g. Homo sapien)
Term
Organism
Definition
A living creature.
Term
Organs
Definition
A functional structure in the body composed of tissues.
Term
Taxonomy
Definition
The science of classification.
Term
5 kingdoms
Definition
Plants, Animals, Bacteria, Protists, and Fungi are the 5 kingdoms.
Term
Flagella
Definition
A long whip-like organelle that allows movement in single celled organisms.
Term
Organ system
Definition
A group of organs that are smiliar and help an organism function.
Term
Classification
Definition
The process of grouping organisms due to similarities.
Term
Eukaryote
Definition
A cell with a nucleus.
Term
Cilia
Definition
Hairlike projections on the cell’s membrane allowing movement.
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