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Chapter 4 Vocabulary
These are the key science words for chapter 4 of eBook.
28
Biology
9th Grade
11/03/2013

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Term
Organism
Definition
Any single living thing; can carry all of the functions of life
Term
Classification
Definition
the placing of plants and animals in groups, based on structure and other criteria
Term
Physical traits
Definition
structural or bodily characteristics
Term
Chemical traits
Definition
characteristics that include structures or functions related to chemistry
Term
species
Definition
a group of organisms that are capable of interbreeding and producing viable offspring
Term
domain
Definition
largest classification grouping in biology Ex: Archaea, Bacteria or Eukarya
Term
Archaea
Definition
Prokaryotes that live in the harshest environments
Term
Bacteria
Definition
all prokaryotes except Archaea
Term
Prokaryote
Definition
Pro- "before
Kary- "nucleus"
simple organism without a defined nucleus or other membrane bound organelles
Term
Eukaryote
Definition
Eu- "after"
Kary- "nucleus"
organisms with defined nucleus and other membrane bound organelles
Term
Organelle
Definition
membrane bound structure within a cell
Term
unicellular
Definition
Uni- "one"
single-celled
Term
multicellular
Definition
Multi- "multi"
many celled
Term
homeostasis
Definition
the tendency of a living system, esp. of mammals and other higher animals, to remain more or less stable.
Term
atom
Definition
smallest particle of matter that is studied in biology
Term
molecule
Definition
two or more atoms of chemical elements bonded together
Term
macromolecule
Definition
Macro- "large"
large complex molecule with relatively large molecular weight
Term
tissue
Definition
groups of cells that perform a particular function
Term
organ
Definition
groups of tissues that function together to perform a particular function
Term
organ system
Definition
groups of organs that function together to perform a particular function
Term
population
Definition
a group of organisms of the same species living in the same area
Term
cell
Definition
smallest unit of life that is able to carry out all of the functions of life
Term
community
Definition
group of populations living in a given area
Term
ecosystem
Definition
all of the biotic and abiotic components in a particular environment
Term
biotic
Definition
living
Term
abiotic
Definition
A- "not, no"
non-living
Term
biome
Definition
all of the ecosystems in a particular climatic area
Term
biosphere
Definition
all of the parts of the Earth that are capable of supporting life including all biomes and some of the atmosphere
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