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Ninth grade final
cards cover everything from parts of cell to evolution
23
Biology
9th Grade
12/15/2009

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Cards

Term
Chromatin
Definition
non-condensed DNA
Term
Chromatid
Definition
Chromosomes identical "sister"
Term
Centromere
Definition
where chromatids meet
Term
Dipolid
Definition
a cell that holds both sets of the chromosomes
Term

haploid

 

Definition
a cell that hold half the number of chromosomes
Term
photosynthesis equation
Definition
6CO2+6H2O-light-C6H12O6+6O2
Term
NADPH carries...
Definition
two high-energy electrons and one hydrogen ion
Term
Diffusion is..
Definition
molecules moving from a high concentrated area to a lower concentrated area
Term
Osmosis is..
Definition
is the diffusion of water through a selectively permeable membrane
Term
isotonic...
Definition
having the same or equal osmotic pressure
Term
hypertonic
Definition
higher osmotic pressure
Term
hypotonic
Definition
lower osmotic pressure
Term
species
Definition
a group of organisms so similar to one another, they can breed and produce fertile offspring
Term
population
Definition
group of individuals that belong to the same species and live in the same area
Term
communities
Definition
assemblages of diff. populations that live together in a defined area
Term
ecosystem
Definition
is a collection of all organisms that live in a particular place, together with their nonliving or physical environment
Term
biome
Definition
is a group of ecosystems that have the same climate and similar dominant communites
Term
DNA is made of
Definition
nucleotides
Term
the two purines
Definition
adenine and guanine
Term
the two pyrimdines
Definition
cytosine and thymine
Term
this bond holds the bases[A,T,G,&&C] together
Definition
hydrogen
Term
A codon is
Definition
each "word" in mRNA
Term
water is polar because
Definition
the oxygen is slightly negative and the hydrogen is slightly positive
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