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31 Cards in this Set
- Front
- Back
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all living organisms are composed of cells. they may be unicellular or multicellular.
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cell theory
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the cell is the basic unit of life
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cell theory
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cells arise from preexisting cells
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cell theory
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involve interactions between communities and their enviroment.
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ecosystem
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an individual animal , plant, or single-celled life form
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organism
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systems which work together to keep the body functioning normally
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organ systems
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collection of tissues joined in structural unit to serve a common function
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organs
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groups of cells with both a shared structure and function
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tissues
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the basic stuctural unit of all organisms
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cells
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main role is to provide support for the body, protect organs and provide attach ment sights for organs
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skeletal system
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bones cartilage tendons and ligaments are major organs
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skeletal system
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provides movement for body
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muscular system
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skeletal muscles and smooth muscles throught the body are major organs
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muscular system
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transport nutrients, gases, hormones, and wastes through the body
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circulatory system
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heart, blood vessels, and blood are major organs
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circulatory system
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relay electrical signals through the body
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nervous system
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brain, spinal cord and peripheral nerves are major organs
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nervous system
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provides gas exchange between the blood and the enviroment
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respiratory system
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nose, trachea, and lungs are major organs
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respiratory system
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breaksdown and absorbs nutrients that are necessary for growth and maintenance
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digestive system
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mouth, esophagus, stomach, small and large intestines are major organs
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digestive system
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the blueprint of life instructing cells how to develop and how to function. found in the nucleus of the cell
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DNA
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sequence of DNA that determines a particular trait
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gene
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another name for gene
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allele
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more comon gene that over powers a recessive and shows up in a population more often
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dominant gene/ allele
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weaker less common gene
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recessive gene/ allele
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result of a cross of two parents
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offspring
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reproductive cells that contain one half of an individuals DNA
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gametes
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the passage of genetic instructions from one generation to the next
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heredity
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reproduction where an exact copy of the parents genetic material is passed on to the offspring
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Asexual reproduction
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ability to generate extensive amounts of genetic diversity, ability to produce variable offspring, some if which will have improved chances of survival in changing enviroments
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sexual reproduction
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