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6371372
Biology
Description
Study guide for chapter 1
No tags specified
biology
elementary education
chapter 1
Mind Map by
Sydney Fairchild
, updated more than 1 year ago
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Created by
Sydney Fairchild
about 8 years ago
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Resource summary
Biology
Properties that show life
made up of at least one cell
must reproduce
Has to have order
responds to evironment
growth and development
Levels of Organization- organized by structure and their function
Biosphere- atmosphere of earth
Ecosystem- all organisms living and non-living in a particular area
Community- all living things in an area
Population- all individuals of one species
Organism- one individual living thing
Organ system(11) - all organs in an individual living thing
Organ- one organ in the system with a specific function
Tissue- collections of cells with specific functions
Cell- fundamental unit of all life
Organelle- structures within cells with specific functions
Molecule- two or more atoms (elements from the periodic table)
Atom- simpleist unit of matter that has certain properties
Viruses
not composed of cells
non-living
causes ilness
has to infect a host cell inorder to reproduce-- takes over the cell which then in turn does the infecting and reproducing
Cells - fundamental unit of life, containing DNA
Prokaryotic - before the nucleous
lacks membrane bound organelles
always unicellular
no nucleous
example: bacteria
Eukaryotic - true nucleous
contains membrane bound organells
unicellular or multicelluar
examples: plants, animals, fungi
DNA
contains genes (packets of genetic info)
23 pairs of chromosomes
double helix structure
four chemical building blocks (1990- human genenom project)
about 20,000 genes per person
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