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20 Cards in this Set
- Front
- Back
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146-All matter is made up of____,but only living things are made up of___
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Atoms-Cells
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147-___and __cells join together in fertilization to produce a new animals
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Egg-Sperm
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157-___ ___transport messages throughout the body
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Nerve cells
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162-___ ____animals are able to control their body temparerature
__ ___ animals are unable to control their body temperatures. |
Warm blooded-cold blooded
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171-_______is the two letter code for a specific trait.
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Genotype
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172-____is the physical appearance of a specific trait
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Phenotype
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170-_ _ _ is the chemical compound that codes all life and is found in the chromosomes of each cell
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DNA
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The ____ ____ ____ is used by scientists to help compare present and past life forms
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Geological Time Scale
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The _______determines which traits in an organism are best suited for the survival of the species
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Environment
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The____ __ ______ _________states that organisms with traits that are not suited for their environment usually die before reproducing so their traits are not passed on
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Theory of natural selection
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Rabdom Genetic changes in an organism are called ___
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mutations
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____provide important evidence of how life and enviromental conditions have changed over time
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fossils
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____ ______ occurs when humans choose which traits show up in a population
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selectie breeding
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Exposure to ___in the enviroment can genetically change a living thing
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toxins
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_____get their energy by harming their host
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parasites
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The last stage of succession is a _____ _______________
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climax community
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plants are _____beacausse they make their own food
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producers
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___is a gradual predictable change that happens to an ecosystem
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Succession
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____ ____are the first to arrive in an area
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pioneer species
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__ __occurs when all organisms in a food web have enough resources for their poulation to survive
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natural balance
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