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Cells 1

Cells: Characteristics of Life; Cell Theory; Inside the Cell

TermDefinition
cell basic unit of structure and function
unicellular having only one cell
multicellular having many cells
growth becoming larger
development changing during an organism's lifetime, producing a more complex organism
reproduce produce offspring that are similar to the parents
asexual reproduction only one parent is involved; produce clones (identical to parents)
sexual reproduction reproduction involving two parents, combining genetic material to produce a new organism that differs from both parents
spontaneous generation the belief that life came from non-living things
homeostasis maintenance of stable internal conditions
autotrophs make their own food
heterotrophs cannot make their own food, so must consume food for energy
microscope instrument that makes small objects look larger
cell theory widely accepted explanation of the relationship between cells and living things
organelles tiny structures that carry out specific functions within a cell
cell wall rigid layer that supports the cell and acts like bones
cell membrane controls what enters and leaves the cell
nucleus control center of the cell
chromatin thin strands of material that fill the nucleus; DNA
ribosomes small grain-shaped organelles that make proteins
eukaryotes organisms with cells that contain a nucleus
prokaryotes organisms with cells, without a nucleus
cytoplasm thick, gel-like fluid that fills the cell; supports organelles
mitochondria powerhouse of the cell
endoplasmic reticulum (ER) tubules that help make proteins
vacuole stores water and other materials needed by the cell; or stores wastes
chloroplasts captures energy from sunlight and makes it into usable energy for the cell, via photosynthesis
Created by: kmsew