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20 terms

Lesson 26 - Life Functions in Protists

North Carolina End-of-Course Coach
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protozoans
Animal-like protists. They are heterotrophic-they hunt and gather food.
flagellum
a long projection that looks much like a whip. as the flagellum whips back and forth, the organism is propelled through the water
pseudopod
sarcodines move using projections from the cyto plasm called...
cilia
Short, hairlike projections. This beats back and forth like oars to propel a cell through water.
conjugation
Two organisms join together and exchange some of their genetic material. New individuals are not formed, but new combinatins of genetic material created
spore
A tiny cell that can grow into an organism. They have complex life cycles that involve two or more diferent hosts.
algae
Plant-like protists. Contain chlorophyll and are able to conduct photosynthesis
protists
Diverse group of organisms. They are eukaryotic organisms found everywhere there is water.
Four groups of protozoans
zooflagellates, sarcodines, ciliates, and sporozoans
amoebas
an exampleof sarcodines. Can extend a thick ppseudopod from the center of the cell.
2 types of nucei of ciliates
Larger nucleus-known as the macronucleus, stores
Plasmodium vivax
A protozoan that causes malaria
Characteristics of six groups of plant-like protists
diatoms, dinoflagellates, euglenoids, red algae, brown algae, and green algae
Diatoms
Unicellular organisms found in both fresh water and salt water. Produce thin cell walss rich in slicon. Used in products such as toothpaste, filters, and scouring products
dinoflagellates
Half are autotrophs, the other heterotrophs. Have 2 flagella causing the protists to spin. Reproduce asexually through binary fission.
euglenoids
These protists are unicellular and live mainly in fresh water. Have chloroplasts needed for photosynthesis and no cell wall. Has a pigment known as the eyespot that helps them find sunlight for photosynthesis. Reproduce asexually through binary fission.
red algae
are multicellular. Less than 1 meter length. Live at great depths because they are very efficient at gathering light energy.
brown algae
Found in cool climates. Multicellular. In cool, shallow ocean waters. Largest and most complex algae. Can grow up to 100 meters long.
green algae
Have photosynthetic pigments and cell walls that are the same as those in plants. Found in fresh and salt water and in some moist land area. Some are single cells, some live in colonies, few are multicellular. Reproduce through a cycle of alternation of generations.
fungus-like protists
Similar to fungi in that they are heterotrophs, have cell walls, and use spores to reporduce. Include slime molds and water molds.