The Protists

Animal-Like Protists AKA Protozoa Heterotrophic Consume/ingest/eat material from their surroundings

Type of Protozoans Classified according to locomotion 1.Sarcodina (pseudopod) 2.Mastigophora (flagellated) 3.Ciliophora (ciliated) 4.Sporozoa (parasitic) Peranema Amoeba Paramecium Plasmodium

Sarcodina: AmoebaAmoeba Single celled with no set body shape Creates temporary projections of cytoplasm called pseudopods to move and feed Feed by endocytosis engulfing organisms with their pseudopods

Mastigophora: PeranemaPeranema Found at the bottom of freshwater bodies Morphologically similar to Euglena, without the chloroplasts and eyespot Captures and consume live prey with the help of a rigid feeding apparatus called a “rod-organ”

Ciliophora Covered with hair like projections called cilia All these organisms are aquatic They are the most advanced of the protozoans, living in both fresh and saltwater

Ciliophora: Paramecium Feeding

Sporozoa Parasitic protozoans Lack means of independent locomotion Movements depend entirely on the host’s body fluids Possess fewer organelles and specialized structures Able to multiply asexually in animal tissues by forming haploid reproductive cells, called spores Spores mature into individuals without fertilization

Sporozoa: Plasmodium Causes malaria in humansmalaria Complex life cycle involves two hosts: humans and mosquitoes Insects that transmits sporozoans from one host to the next are called insect vectors

Fungilike Protists Slime moulds Prefer cool, shady, and moist places During some stage of their life cycle, they may resemble protozoans At other time, they produce spores like fungi

Fungilike Protist Some species converge into a large, slimy plasmodial mass and act like a single organism Role in the environment – Like Fungus, slime moulds consume dead organic matter – Also consume bacteria and fungi

Homework Text page 133 – Questions: 4, 6, 9, 13