smallest part of a living thing that can carry out processes of life
cell
a thin outer layer of a cell
cell membrane
the gel-like material inside the cell that holds all the other inner parts of a cell
cytoplasm
a large, round structure at the center of a cell that controls all the activities of a cell
nucleus
the part of a cell that breaks down food and turns it into energy for the cell
mitochondrion
a cell part that holds food, water, and wastes
vacuole
a hard outer layer of a plant cell that protects the cell and provides support
cell wall
a part of a plant that uses energy from sunlight to make food
chloroplast
an individual living thing that can carry out all its own life activities
organism
a group of similar cells that do the same job in an organism
tissue
a body part made of different kinds of tissues that work together to do a certain job
organ
a group of organs that work together to do a certain job
organ system
the highest taxonomic category of organisms in biological classification
domain
the broadest group into which living things are classified
kingdom
an animal that does not have a backbone
invertebrate
an animal that has a backbone
vertebrate
any plant that soaks up (absorbs) water from the ground directly into its cells
nonvascular (plant)
any plant that has tubes for moving water and other materials to where they are needed
vascular (plant)
one-celled living things that do not have a nucleus
bacteria (prokaryote)
a one- or many-celled organism that can either make, eat, or absorb food
protist (eukaryote)