Protists (Team: Eleonora, Carlos, Nathalie, Montse) by Eleonora Martina Burei https://padlet.com/elliemartinaburei/cr5onjebagp2mb62 Here is everything you need to know about protists! en-us 2021-11-29 16:55:54 UTC 2025-10-22 21:30:48 UTC hello@padlet.com General Characteristics nathaliebarqui https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1918459285
  • Protists may share certain morphological and physiological characteristics with animals or plants or both. 
  • Most have mitochondria.
  • They can be parasites.
  • They all prefer aquatic or moist environments.
  • Protista reproduces by asexual means. The sexual method of reproduction is extremely rare and occurs only during times of stress.
  • Protists can be autotrophic or heterotrophic: Autotrophic means the organism produces its own food either via light as in photosynthesis or via chemical interactions called chemosynthesis. Heterotrophic means the organism can not produce its own food and instead gains energy by consuming other organisms, such as plants or animals.
  • Protists exhibit locomotion through cilia and flagella. A few organisms belonging to kingdom Protista have pseudopodia that help them to move.
    •  
    ]]>     2021-11-29 17:03:43 UTC https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1918459285     What are they? elliemartinaburei https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1918466225 Protists are eukaryotes, which means their cells have a nucleus and other membrane-bound organelles. Most, but not all, protists are single-celled. The simplest definition is that protists are all the eukaryotic organisms that are not animals, plants or fungi. 


    ]]>     2021-11-29 17:06:28 UTC https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1918466225     Examples of protists carloscambranis https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1918468589
    • There are approximately 60,000 - 200,000 species of protists and many of them have not been identified.
    Amoeba Proteus (Animal-like)
    • Is unicellular.
    • Uses extensions called pseudopodia to move and to eat smaller unicellular organism. 
    • Food is enveloped inside the cell's cytoplasm in a food vacuole, where ingested matter is slowly broken down by enzymes. Typically feeds on protozoans, algae, rotifers, and even other smaller amoebae. 
    • It inhabits freshwater environments because they need a moist environment to survive. Damp soil, marshes, puddles, lakes, and the ocean are the usual places they live in.
    • Is colourless, but may have coloured inclusions derived from its food.
    Red Algae, Rhodophyta Florideophyceae (Plant-like)
    • Red algae are typically found in tropical marine environments where they often grow on flat surfaces, such as reefs. Though red algae may be unicellular, they are typically multicellular organisms and form a variety of seaweeds.
    • The red algae form a distinct group characterized by having eukaryotic cells without flagella and centrioles, chloroplasts that lack external endoplasmic reticulum and contain unstacked (stroma) thylakoids, and use phycobiliproteins as accessory pigments, which give them their red color.
    • Lack of flagella and centrioles
    • Presence of photosynthetic pigments
    • Stored food is in the form of starch and polymers of galactan sulphate
    • Their cell walls consist of cellulose and many different types of carbohydrates.
    • Grow on solid surfaces independently or sometimes found attached to other algae.
    • Presence of pit in the cell walls, through which cytoplasmic connec­tions are maintained.
    • Mode of Reproduction: It takes place by all the three means: vegetative, asexual and sexual. 
    Slime molds, Myxogastria Mycetozoa (Fungi-like)
    • Slime molds are often found on rotting logs, where they feed on decaying organic matter. 
    • They are often unicellular but, when food is scarce, can swarm together to form a slimy mass. These brightly colored blobs can move very slowly in their search for food and, in some cases, can fuse to form one enormous, multinucleated cell.
    • They feed on microorganisms that live in any type of dead plant material. They contribute to the decomposition of dead vegetation, and feed on bacteria, yeasts, and fungi. 



    ]]>     2021-11-29 17:07:28 UTC https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1918468589     Bibliography (Info & Images) nathaliebarqui https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1919370482 BYJUS (2021, January 14). Kingdom protista - characteristics and classification of Protists. BYJUS. Retrieved December 1, 2021, from https://byjus.com/biology/protista/.

    Encyclopædia Britannica, inc. (2021). Protist. Encyclopædia Britannica. Retrieved December 1, 2021, from https://www.britannica.com/science/protist.

    Foundation, C. K.-12. (2021). 12 foundation. CK. Retrieved December 2, 2021, from https://flexbooks.ck12.org/cbook/ck-12-middle-school-life-science-2.0/section/6.1/primary/lesson/protist-characteristics-ms-ls/.

    Latham, B. K., By: & Latham, K. (2021, March 1). Animal-like, fungus-like, and plant-like protists. Biology Dictionary. Retrieved December 2, 2021, from https://biologydictionary.net/animal-like-fungus-like-and-plant-like-protists/.

    Libretexts. (2021, March 6). 8.1: Protist kingdom. Biology LibreTexts. Retrieved December 1, 2021, from https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book%3A_Introductory_Biology_(CK-12)/08%3A_Protists_and_Fungi/8.01%3A_Protist_Kingdom.

    Libretexts. (2021, March 6). 8.5: Algae. Biology LibreTexts. Retrieved December 2, 2021, from https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book%3A_Introductory_Biology_(CK-12)/08%3A_Protists_and_Fungi/8.05%3A_Algae.

    Protist    . Protist - an overview | ScienceDirect Topics. (2021). Retrieved December 2, 2021, from https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/protist. 



    ]]>     2021-11-30 02:11:52 UTC https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1919370482     Classification of Protists elliemartinaburei https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1920881063
    For classification, the protists are divided into three groups:

    1. Animal-like protists: also known as Protozoa, are unicellular and heterotrophic, meaning they seek out food in their surrounding environments. Some animal-like protists prey on other, smaller microorganisms, which they engulf and digest in a process known as phagocytosis. Others may feed on non-living, organic matter. Many Protozoa have a mouth like structure through which they can ingest food particles, while some absorb nutrients through their cell membrane.
    2. Plant-like protists: also know as algae, are autotrophs that photosynthesize. Algal cells usually have a cell wall which, like the cell walls of true plants, contain cellulose. However, unlike true plants, algae lack leaves, stems, and roots. Plant-like protists may reproduce asexually or sexually.  
    3. Fungi-like protists: also known as molds, are heterotrophic feeders and absorb nutrients from decaying organic matter in their environment. They also reproduce using spores. However, they differ from true fungi in that their cell walls contain cellulose, rather than chitin.

    But remember, protists are not animals, nor plants, nor fungi.

    ]]>     2021-11-30 16:44:59 UTC https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1920881063     Important Facts about Protists elliemartinaburei https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1920908915
  • Protists serve as the foundation of the food chain.
  • Protists are symbionts – having a close relationship between two species in which, one is benefited.
  • Some protists also produce oxygen and may be used to produce biofuel.
  • Protists are the primary sources of food for many animals.
  • In some rare cases, Protists are harvested by humans for food and other industrial applications.
  • Phytoplankton is one of the sole food sources for whales
  • Seaweed is an alga, which is considered a plant-like protist.
  • Zooplankton is fed on by various sea creatures including shrimp and larval crabs.

    • ]]>     2021-11-30 16:56:33 UTC https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1920908915     elliemartinaburei https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1925015436 2021-12-02 12:43:40 UTC https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1925015436 elliemartinaburei https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1925028654 2021-12-02 12:51:23 UTC https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1925028654 elliemartinaburei https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1925031318 2021-12-02 12:52:47 UTC https://padlet.com/elliemartinaburei/cr5onjebagp2mb62/wish/1925031318