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Biology terms for exit exam
Mrs. Bratcher Biology class
10
Biology
10th Grade
08/11/2009

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Term
abiotic factor
Definition
physical, or non-living, factor that shapes an ecosystem
Term
acid rain
Definition
rain containing nitric and sulfuric acids (pH less than 6)
Term
active transport
Definition
energy-requiring process that moves material across the cell membrane against a concentration difference
Term
adaptation
Definition
inherited characteristic that increases an organism's chance of survival
Term
adenine
Definition

nitrogen base, purine, part of a nucleotide

bonds with thymine in DNA

bonds with uracil in RNA

Term
aerobic
Definition
process that requires oxygen
Term
agar
Definition
medium used in a petri dish to grow bacteria
Term
allele
Definition

one of the number of different forms of a gene

example:  B=brown

Term
amino acids
Definition

compound with an amino group on one end and a carboxyl group on the other end

20 essential amino acids

Term
ammonia
Definition
when organisms die, decomposers return nitrogen to the soil as ammonia
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