Middle School Biology

Khan Academy

Cells

The building blocks of life

Unicellular

Organisms that are made up of 1 cell

Multicellular

An organism that are made up of many cells

Microscopes

Instruments that make objects too small for the human eye appear larger

What does CER stand for

Claim, evidence, reasoning

Cell theory

Explains what scientists have observed over time to be true for all cells

Cell Membrane

Regulates what comes into and out of the cell

Cytoplasm

Jelly-like substance containing cell parts

Organelles

Small compartments in the cell that have different structures and functions

Mitochandria

Releases energy for the cell to use for other tasks

Nucleus

Info database (contains DNA)

Genes

Special instructions the cell uses to carry out its functions

Chloroplasts

The organelle responsible for carrying out photosynthesis

Cell wall

Provides structure in plant cellsV

Vacuoles

A cell’s storage structures

Ribosomes

Use the instructions from the cell’s DNA to build specific molecules, usually proteins