organism
Any living thing
cell
the smallest unit of an organism that carries on the functions of life
homeostasis
The regulation of an organism's internal, life-maintaining condition despite changes in its environment
binomial nomenclature
The two-word naming system that Linnaeus used to name various organisms
genus
group of similar species.
phylogeny
evolutionary history of an organism, that is, how the organism has changed over time.Today, it is the basis for the classification of many organisms
kingdom
first and largest category used to classify organisms
cell theory
states that all organisms are made up of one or more cells, the cell is the basic unit of life, and all cells come from other cells.
cell wall
rigid structure that encloses, supports, and protects the cells of plants, algae, fungi, and most bacteria
cell membrane
protective outer covering of all cells that regulates the interaction between the cell and the environment
cytoplasm
constantly moving gelatin like mixture inside the cell membrane that contains heredity material and is the location of most of a cell's life processes.
ribosome
small structure on which cells make their own proteins
organelle
structure in the cytoplasm of a eukaryotic cell that can act as a storage site, process energy, move materials, or manufacture substances
nucleus
All cellular activities are directed by it. Materials enter and leave the it through openings in its membrane. It contains long, threadlike, hereditary material made of DNA.
chloroplast
green, chlorophyll-containing, plant-cell organelle that captures light energy, which is used to make sugar.
mitochondrion
cell organelle where food is broken down, which releases energy.
endoplasmic reticulum
cytoplasmic organelle that moves materials around in a cell and is made up of a complex series of folded membranes; can be rough (with attached ribosomes) or smooth (without attached ribosomes).
Golgi body
organelles that sort and package cellular materials and transport them within the cell or out f the cell
tissue
group of similar cells that work together to do one job.
organ
structure, such as the heart, made up of different types of tissues that all work together
organ system
group of organs working together to perform a certain function
virus
strand of hereditary material surrounded by a protein coating.
host cell
living cell in which a virus can actively multiply or in which a virus can hide until activated by environmental stimuli