Nucleus
The region of a eukaryotic cell that contains the cell's main DNA.
Vacuole
A membrane-bounded "sac" within a cell.
Ectoplasm
The thin, watery cytoplasm near the plasma membrane found in the interior of some cells.
Flagellate
A protozoan that propels itself with a flagellum.
Pseudopods
A temporary, foot-like extension of a cell, used for locomotion or engulfing food.
Pellicle
A firm, flexible coating outside the plasma membrane.
Chloroplast
An organelle containing chlorophyll for photosynthesis.
Chlorophyll
A pigment necessary for photosynthesis.
Eyespot
A light sensitive region in certain protozoa.
Symbiosis
A close relationship between two or more species where at least one benefits.
Mutalism
A relationship between two or more organisms of different species where all benefit from the association.
Commensalism
A relationship between two organisms of different species where one benefits and the other is neither harmed nor benefited.
Parasitism
A relationship between two organisms of different species where one benefits and the other is harmed.
Endoplasm
The dense cytoplasm found in the interior of many cells.
Cilia
Hair-like projections that extend from the plasma membrane and are used for locomotion.
Spore
A reproductive cell with a hard, protective coating.
Plankton
Tiny organisms that float in the water.
Zooplankton
Tiny floating organisms that are either small animals or protozoa.
Phytoplankton
Tiny floating photosynthetic organisms primarily algae.
Thallus
The body of a plant-like organism that is not divided into leaves, roots, or stems.
Cellulose
A substance made of sugars that is common in the cell walls of many organisms.
Holdfast
A special structure used by an organism to anchor itself.
Sessile Colony
A colony that uses holdfasts to anchor itself.
Nucleus
The region of a eukaryotic cell that contains the cell's main DNA.
Vacuole
A membrane-bounded "sac" within a cell.
Ectoplasm
The thin, watery cytoplasm near the plasma membrane found in the interior of some cells.
Flagellate
A protozoan that propels itself with a flagellum.
Pseudopods
A temporary, foot-like extension of a cell, used for locomotion or engulfing food.
Pellicle
A firm, flexible coating outside the plasma membrane.
Chloroplast
An organelle containing chlorophyll for photosynthesis.
Chlorophyll
A pigment necessary for photosynthesis.
Eyespot
A light sensitive region in certain protozoa.
Symbiosis
A close relationship between two or more species where at least one benefits.
Mutalism
A relationship between two or more organisms of different species where all benefit from the association.
Commensalism
A relationship between two organisms of different species where one benefits and the other is neither harmed nor benefited.
Parasitism
A relationship between two organisms of different species where one benefits and the other is harmed.
Endoplasm
The dense cytoplasm found in the interior of many cells.
Cilia
Hair-like projections that extend from the plasma membrane and are used for locomotion.
Spore
A reproductive cell with a hard, protective coating.
Plankton
Tiny organisms that float in the water.
Zooplankton
Tiny floating organisms that are either small animals or protozoa.
Phytoplankton
Tiny floating photosynthetic organisms primarily algae.
Thallus
The body of a plant-like organism that is not divided into leaves, roots, or stems.
Cellulose
A substance made of sugars that is common in the cell walls of many organisms.
Holdfast
A special structure used by an organism to anchor itself.
Sessile Colony
A colony that uses holdfasts to anchor itself.