A flagellated protozoal parasite of the small intestine that can cause watery diarrhea.

A type of bacteria that infects the respiratory system.

A virus that causes gastrointestinal infections through contaminated food.

A fungal infection that affects the skin.

Unicellular eukaryotes that inhabit moist environments. Many have complex life cycles. No cell walls.

Multicellular organisms with rigid cell walls that thrive in dry environments.

Prokaryotic organisms that can photosynthesize and live in extreme conditions.

Simple organisms that lack a nucleus and are found in extreme environments.

motile feeding stage of protozoa

inactive reproductive stage of bacteria

spore-forming stage of fungi

larval stage of multicellular organisms

an animal that transmits a pathogen from one host to the next

a type of virus that causes disease

a method of disease prevention

a genetic mutation that leads to disease

organism that can obtain nutrition by autotrophic or heterotrophic means, usually facultatively

organism that only obtains nutrition through photosynthesis

organism that exclusively feeds on other organisms

organism that can survive without any nutritional intake

A process where a cell engulfs another cell without any organelles.

When a cell that already contains an organelle derived from primary endosymbiosis is engulfed by another cell.

A type of symbiosis that occurs only in prokaryotic cells.

The process of organelle replication within a single cell.

The process by which one prokaryotic cell engulfs another prokaryotic cell.

The engulfment of one cell (prokaryotic) by another (eukaryotic) such that the engulfed cell survives, and both cells benefit; responsible for the evolution of mitochondria and chloroplasts.

A method of cellular respiration that occurs in mitochondria.

The formation of new cells through binary fission.

Yeast that can cause vaginal infections and thrush

Bacteria responsible for strep throat

Virus that causes the common cold

Fungus that leads to athlete's foot

important role played by photosynthetic protists

organisms that consume other organisms

decomposers in the ecosystem

organisms that do not require sunlight

organism that breaks down and obtains energy from dead organic matter

organism that produces energy through photosynthesis

organism that consumes living plants and animals

organism that stores energy in the form of fat

single-celled organisms that reproduce by binary fission

multicellular fungi; cells form strands called hyphae which can grow into a mycelium which has a fuzzy appearance

photosynthetic organisms that produce their own food

prokaryotic cells that lack a nucleus

bacterial infection(s)

viral infection(s)

fungal infection(s)

parasitic infection(s)

organism that uses energy from sunlight to convert carbon dioxide and water to carbon compounds

organism that consumes organic material for energy

organism that relies on chemical energy from inorganic substances

organism that can survive without sunlight or organic compounds

Protozoans that are all parasites and have complex life cycles. Example: Plasmodium causes malaria

Bacteria that are primarily free-living and non-parasitic

Fungi that reproduce through spores and are not parasitic

Viruses that infect host cells and do not have complex life cycles

A symbiotic relationship where both parties benefit

A relationship where one organism benefits and the other is harmed

A relationship where both organisms are harmed

A relationship where one organism is neutral to the other

Group of bacteria that can photosynthesize and are found in soil.

Group of protists that form 'blooms' and can cause disease when humans consume infected shellfish.

Type of algae that are primarily found in freshwater environments.

Group of fungi that decompose organic matter in marine ecosystems.

an organism deriving its nutritional requirements from organic substances.

a type of plant that produces its own food through photosynthesis.

a microorganism that can survive in extreme environments.

an organism that primarily feeds on inorganic substances.

A type of multicellular fungus.

A general term used to describe unicellular fungi.

A type of bacteria used in fermentation.

A plant used for baking.

Marine algae that are primarily green in color.

Marine algae in which the chlorophyll is masked by a red or purplish pigment.

Freshwater algae that are unicellular and lack pigmentation.

Algae that reproduce only asexually.