Photoautotroph or heterotroph (or both) unlike bacteria; some like earliest eukaryotic cells. Has a nucleus, larger ribosomes, mitochondria, ER, Golgi bodies, chromosomes with numerous proteins, and cytoskeletal microtubules. Range in size from microscopic algae to giant kelps. euglenoid Single-celled, flagellated protistan; photosynthetic but with heterotrophic feeding apparatus (it has phagocytic ancestors). amoeboid protozoan
A predatory or parasitic protistan that moves by pseudopod formation and cytoplasmic streaming (e.g., an amoeba or a foraminiferan, heliozoan, or radiolarian). pseudopod A dynamically extending lobe of cytoplasm used for motility or engulfment. plankton Aquatic community of primarily microscopic autotrophs and heterotrophs. contractile vacuole
Organelle in some protistans; expels excess water. binary fission
Asexual reproductive mode; the body of protozoans and some other animals divides in two parts. See prokaryotic fission. conjugation Prokaryotic gene transfer mode; also protistan sexual reproductive mode. dinoflagellate Type of single-celled, flagellated, cellulose-plated protistan. Most are producers of marine phytoplankton; some cause red tides. algal bloom
Huge increases in aquatic algal population sizes as a result of nutrient enrichments.
//////////////////////////////////////////////////////////////////////////////////////////////////////////// lichen Symbiotic interaction between a fungus and photoautotroph. extracellular digestion and absorption
Mode of nutrition