word | definition |
organisms | living things |
cell | the basic unit of structure and function in an organism |
unicellular | single celled organisms |
multicellular | organisms are composted of many cells that are specialized to do certain tasks |
stimulus | a change in an organisms surrounding that causes the organism to react |
response | an action or change in behavior |
development | the process of change that occurs during an organisms life to reproduce a more complex organisms |
spontaneous generation | the idea that living things can arise from nonliving sources. |
autotrophs | organisms that can maker their own food |
heterotrophs | organisms that cannot make their own food |
homeostasis | the maintenance of stable internal conditions |
classification | the process of grouping things based on their similarities |
taxonomy | the scientific study of how living things ar classified |
binomial nomenclature | giving each organism a unique two part name. |
species | a group of similar organisms that can mate with each other and produce offspring that can also mate and produce |
genus | the first word in an organism's scientific name. |
prokaryotes | organisms whose cells lack a nucleus |
nucleus | a dense area in a cell that contains nucleus a nucleic acids |
eukaryotes | organisms with cells that contain nuclei |
cells | the basic units of structure and function in living things. |
microscope | an instrument that makes small objects look larger |
cell theory | a widely accepted explanation of the relationship between cells and living things |
organelles | structures within the cell with different functions |
cell membrane | covers the cell and lets in material and holds parts of the cell together |
cytoplasm | a jelly like substance to keep cells working properly |
mitrchondria | breaks down food and releases the energy that it gets from the food |
vacuole | provides storage for food, water, and wastes |
chloroplast (only in a plant cell) | make up the food factory, contain chlorophyll and use the sun's energy to make food |
cell wall (only in a plant cell) | rigid layer that supports the plant |
ribosomes | they function as factories to produce proteins |
endoplasmic reticulum | a passageway that carries proteins and other materials from one part of the cell to another |