SBI3UI – Diversity of Living Things – Unit 1: Biodiversity – Lesson 8 Date:______________ Kingdom Protista What is a Protist? Protists form a group of organisms that really do not fit into any other kingdom. Although there is a lot of variety within the protists, they do share some common characteristics: • All protists are _____________. That is, all protists have cells with __________. In addition, all protists live in ______________ environments. • Protists can be _____________ or _____________. Protists can be microscopic or can be over 100 meters (300 feet) long. Some protists are_______________, while others are ________________. • Since protists vary so much, we will group them into three subcategories: ____________‐like protists, ____________‐like protists, and ____________‐like protists. A. Animal‐like Protists: Protozoans Protists that are classified as animal‐like are called _______________ and share some common traits with animals. All animal‐like protists are ______________. Likewise, all animal‐like protists are able to _____________ in their environment in order to find their food. Unlike animals, however, animal‐ like protists are all ______________. Animal‐like protists are divided into four basic groups based on how they move and where they live: Sarcodines Amoeba Ciliates Paramecium Flagellates Move and capture food by Move and capture food by using pseudopodia (finger‐ beating numerous hair‐like like structures). cilia. Sporozoans Trypanosoma (“sleeping sickness”) Move by means of one or more whip‐like flagella. Many live in the bodies of other organisms. Plasmodium (malaria) Non‐motile parasites that form spores during their life‐cycle. B. Plant‐like Protists: Algae Plant‐like protists are ______________ (they can perform photosynthesis). They can live in soil, on the bark of trees, in fresh water, and in salt water. These protists are very important to the Earth because they produce a lot of ______________, and most living things need oxygen to survive. Furthermore, these plant‐like protists form the base of aquatic food chains. These plant‐like protists can be ________________, ________________, or live in ________________. The plant‐like protists are divided into four basic groups: euglenoids, dinoflagellates, diatoms, and algae. Euglenoids Euglenida Dinoflagellates Diatoms Algae Peridinium Unicellular. Autotrophic when sunny; heterotrophic when dark. Some have flagellum. Unicellular. Covered by stiff plates. Have 2 flagella. Found in ocean. May glow in the dark. Arachnoidiscus Volvox Unicellular. Has silica cell walls. One of the most common types of phytoplankton. Multicellular: brown and red algae; Unicellular and multicellular: green algae. C. Fungus‐like Protists: Slime Moulds and Water Moulds Fungus‐like protists are ________________ with ________________. They also reproduce by forming _____________. All fungus‐like protists are able to move at some point in their lives. There are essentially two types of fungus‐like protists: water molds and slime molds. Water Molds Slime Molds • • • Live in water or moist environments Look like tiny threads with a fuzzy covering Attack food such as potatoes, cabbage, and corn and can destroy whole crops • • • • Live in moist soil & on decaying plants and trees Very colorful Move by forming pseudopods Feed on bacteria and other microorganisms HW: Read p. 432‐448 and add/integrate any new information into your notes.
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