unicellular organisms
multicellular organisms
functions & structures
cell theory basics
fun facts
100

A one-celled organism, like this example often found in pond water

amoeba

100

Multicellular organisms are made of this

cells

100

This cell structure controls what enters and exits the cell

cell membrane

100

This German scientist, known as the "Father of Microbiology," improved the microscope

Anton van Leeuwenhoek

100

This process, when yeast grows and ferments, is used in bread-making

fermentation

200

This organelle in a unicellular organism controls all its functions

nucleus

200

Humans, plants, and animals belong to this group: unicellular or multicellular?

multicellular

200

Multicellular organisms often have specialized cells with these structures for energy production.

mitochondria

200

cells are the basic units of life, and ____.

cells come from other cells

200

The largest known single cell is the unfertilized egg of this large bird.

ostrich

300

Unicellular organisms belong to this kingdom that includes bacteria

monera

300

Cells in a multicellular organism can have these unique roles, such as nerve or muscle cells

specialized cells

300

Unicellular organisms have to perform all of these for survival, which are shared with multicellular organisms

life functions

300

This invention allowed scientists to study cells in greater detail

microscope

300

This tiny organism is a unicellular protist that uses hair-like cilia to move

paramecium

400

Some unicellular organisms move by using this "tail-like" structure

flagella/ flagellum

400

All the cells in a multicellular organism work together to maintain this internal balance

homeostasis

400

Both types of cells have this gel-like substance where cell parts are suspended

cytoplasm

400

This part of cell theory explains how cells come from other _____.

other cells

400

plants, animals, fungi, and protists are examples of organisms made of this number of cells

multicellular

500

unicellular organism divides into two identical copies of itself

binary fission

500

this term describes the organization levels from smallest to largest: cell, tissue, _____.

organ

500

This organelle, found in plant cells, is used to convert sunlight into energy

chloroplast

500

All living things are made of cells, which are called the basic units of ______

life

500

These organisms are extremely small and can be unicellular or multicellular, yet lack organized nuclei and membrane-bound organelles

bacteria

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