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Life end of book test
life science
70
Science
7th Grade
12/26/2011

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Term
cell
Definition
basic unit of life
Term
tissue
Definition
many cells combined to perform one function
Term
organ
Definition
many tissues combined to perform one function
Term
organ system
Definition
many organs combined to perform one function
Term
organism
Definition
any living thing
Term
population
Definition
organisms of one specie in one location
Term
community
Definition
many populations in one location
Term
ecosystem
Definition
a community plus the nonliving parts of the area
Term
unicellular
Definition
made up of one cell
Term
multicellular
Definition
made up of many cells
Term
prokaryotic
Definition
cells that do not have organelles (such as bacteria)
Term
eukaryotic
Definition
cells that do have organelles
Term
1. all living things are made of cells
2. cells are the basic unit of life
3. cells can only come from other cells
Definition
3 parts of the cell theory
Term
nucleus
Definition
part of cell that is surrounded by a membrane that contains pores
Term
ribosomes
Definition
smallest organelle; produces proteins
Term
ribosomes
Definition
smallest organelle; produces proteins
Term
mitochodria
Definition
organelle which breaks down sugar to produce energy
Term
ATP
Definition
the form of energy in the mitochondria
Term
chloroplasts
Definition
organelle which performs photosynthesis in plant cells
Term
vacuoles
Definition
vesicle that stores water
Term
diffusion
Definition
the passive transport of solute molecules from areas of high concentration to areas of low concentration
Term
osmosis
Definition
the passive transport of water molecules
Term
passive transport
Definition
movement through a membrane without the use of energy
Term
active transport
Definition
movement through a membrane with the use of energy
Term
endocytosis
Definition
active transport of large molecules into a cell using a vesicle
Term
exocytosis
Definition
active transport of large molecules out of a cell using a vesicle
Term
respiration
Definition
the process by which cells use oxygen to get energy from food
Term
mitochondria
Definition
location of respiration in cells
Term
photosynthesis
Definition
process by which autotrophs make glucose from energy from the sun
Term
autotrophs
Definition
organisms who can do photosynthesis
Term
heterotrophs
Definition
organisms which can not do photosynthesis
Term
3 parts of cell cycle
Definition
1. interphase
2. mitosis
3. cytokinesis
Term
interphase
Definition
the phase of the life cycle of a cell when it is not dividing
Term
mitosis
Definition
the phase in the life cycle of a cell when the nucleus divides
Term
cytokinesis
Definition
the phase in the life cycle of a cell when the cytoplasm divides
Term
prophase
Definition
the phase of mitosis when the chromatin turns into chromosomes and the nuclear membrane disappears
Term
metaphse
Definition
the phase of mitosis when the chromosomes line up at the equator
Term
anaphase
Definition
the phase in mitosis when the chromsomes separate and move to opposite poles
Term
telophase
Definition
the phase in mitosis when the chromosomes turn back into chromatin and the organelles reappear
Term
cell plate
Definition
the cell wall that forms between two plant cells during cytokinesis
Term
chromosomes
Definition
DNA in X form
Term
chromatin
Definition
DNA in thread form
Term
chromatids
Definition
1/2 of a chromosome
Term
centrioles
Definition
the organelle that produce the spindle in mitosis
Term
allele
Definition
the forms of a trait
Term
dominant
Definition
the allele that is shown in a heterozygote
Term
recessive
Definition
the allele that is hidden in a heterozygote
Term
genotype
Definition
the actual combination of alleles in an organism
Term
phenotype
Definition
the physical expression of the alleles in an organism
Term
selective breeding
Definition
deliberately choosing the parents of a cross to produce desired offspring
Term
meiosis
Definition
formation of sex cells
Term
sugar, base, phosphate
Definition
3 parts of a nucleotide
Term
transcription
Definition
making a near exact copy of 1 gene of DNA; 1st part of protein synthesis
Term
nucleus
Definition
location of transcription
Term
translation
Definition
using the code on mRNA to connect amino acids to make a protein
Term
ribosome
Definition
location of translation
Term
amino acids
Definition
building blocks of proteins
Term
organisms that can interbreed and produce fertile offspring
Definition
species
Term
speciation
Definition
formation of a new species
Term
1. separation
2. adaptation
3. division
Definition
3 steps of speciation
Term
genus and species
Definition
how do scientists name organisms
Term
unicellular
Definition
are Archaea unicellular or multicellular?
Term
prokaryotic
Definition
are Archaea eukaryotic or prokaryotic?
Term
prokaryotic
Definition
are Bacteria eukaryotic or prokaryotic?
Term
unicellular
Definition
are bacteria unicellular or multicellular?
Term
uni
Definition
are protists unicellular or mulitcellular?
Term
eukarotic
Definition
are protists eukarotic or prokaryotic?
Term
eukaryotic
Definition
are fungi eukaryotic or prokaryotic?
Term
both!
unicellular - yeast
multicelluar - mushrooms, mold, mildew
Definition
are fungi unicellular or multicellular?
Term
Heterotrophic
Definition
are fungi autotrophic or heterotrophic?
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