Term | Definition |
constants | a variable that stays the same during an experiment |
alleles | term used for the different forms of genes |
recessive | a trait that appears only when both alleles are present |
genetics | study of heredity |
nucleus | control center of the cell |
cell membrane | controls what goes in and out of a cell |
tissues | formed when similar types of cells work together |
muscle tissue | the tissue that helps your body move |
mitochondria | organelle where cellular respiration takes place |
chloroplast | organelle where photosynthesis takes place |
community | made up of all the populations in an area |
biosphere | all places where organisms live on earth |
asthenosphere | plasticlike layer below the lithosphere |
continental drift | idea that continents move slowly across Earth's surface |
pangaea | large, ancient landmass that consisted of all the continents on earth |
lithosphere | composed of the crust and the upper mantle |
plate tectonics | explains the locations of mountains, volcanoes, and trenches |
mantle | layer of earth that contains the asthenosphere |
divergent boundary | boundary formed when plates that move apart |
convergent boundary | boundary formed when plates come together |
transform boundary | boundary formed when plates slide past one another |
independent variable | variable that is changed on purpose |
dependent variable | factor that is being measured |
control | variable that is treated the same as the experimental group except the independent variable is not applied; used for comparison |
microorganisms | causes infectious diseases |
prokaryotic cell | cell without membrane bound structures |
eukaryotic cell | cell with membrane bound structures |
epithelial tissue | tissue that covers the outer surface of the body |
genetic engineering | biological and chemical methods to change the arrangement of DNA that makes up a gene |
selective breeding | the process by which desired traits of certain plants and animals are selected and passed on to future generations |
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