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Life Science Vocab 16

AB
AntibioticA substance, such as penicillin, that is capable of destroying or weakening certain microorganisms, especially bacteria or fungi, that cause infections or infectious diseases.,
CapillariesTiny blood vessels, connecting arties to veins, through which materials are exchanged between the blood and the body's cells,
ChromosomeAny of several threadlike bodies, consisting of chromatin, that carry the genes in a linear order the human species has 23 pairs, designated 1 to 22 in order of decreasing size and X and Y for the female and male sex chromosomes respectively.,
DecomposersAn organism, usually a bacterium or fungus, that breaks down the cells of dead plants and animals into simpler substances,
EctothermicAnimals which must use heat acquired from the environment and behavioral adaptations to regulate body temperature,
FertilizationThe joining of an egg cell and a sperm cell, during sexual reproduction, to begin development of a new individual.,
HeartAn organ, made mostly of muscle, that contracts (beats) regularly to pump blood throughout the body.,
Ionic bondsThe attraction between two oppositely charged ions.,
MembraneThe thin, limiting covering of a cell or cell part,
Natural SelectionThe process by which forms of life having traits that better enable them to adapt to specific environmental pressures, as predators, changes in climate, or competition for food or mates, will tend to survive and reproduce in greater numbers than others of their kind, thus ensuring the perpetuation of those favorable traits in succeeding generations.,
Organ SystemsTwo or more different organs that work together to provide a common function,
ProducersAn organism, as a plant, that is able to produce its own food from inorganic substances.,
RodsCells on the retina that detect dim light.,
SymbiosisA relationship of mutual benefit or dependence.,
VacuoleA tiny cavity filled with fluid in the cytoplasm in the cell.,


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