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18 terms

Chapter 2 Quiz

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cells
the basic unit of structure and function in living things
unicellular
organisms made of one cell
multicellular
organisms made up of many cells
stimulus
a change in an organism's environment that causes a reaction
spontaneous generation
a mistaken idea that living things arise from nonliving sources
development
the process of changing into a more complex organism
autotrophs
organisms that make their own food
heterotrophs
organisms that cannot make their own food
taxonomy
the scientific study of how living things are classified
species
a group of organisms that can mate with each other and produce offspring that can mate and reproduce
genus
the first word of an organism's scientific name
eukaryote
organisms whose cells contain nuclei
prokaryote
organisms whose cells do not have a nucleus
nucleus
the dense (dark) part of some cells that contain nucleic acids
cell wall
(in plant cells) the rigid layer of nonliving material that surrounds the plant cell
chloroplasts
(in plant cells) take sunlight energy and make food for the plant cell
cytoplasm
the region between the cell membrane and the nucleus
mitochondria
organelles that convert energy in food into energy for the cell