5 public questions tagged with this topic.
Amoeboid protozoans move and capture their prey by extending pseudopodia, or false feet. Amoeba is a common example of this group.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Protista - Euglenoids Slime Moulds Protozoans
Amoeboid protozoans use pseudopodia for movement and food capture. Ciliated protozoans use coordinated cilia to direct food-bearing water into a gullet, while sporozoans possess an infectious spore-like stage in their life cycle.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Protista - Euglenoids Slime Moulds Protozoans
Amoeboid protozoans use pseudopodia for movement and food capture. Sporozoans possess an infectious spore-like stage; Plasmodium is the example given for this group.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Protista - Euglenoids Slime Moulds Protozoans
Amoeboid locomotion relies on dynamic remodeling of actin cytoskeleton producing cytoplasmic extensions termed pseudopodia meaning false feet. Through polymerization of G-actin at leading edge forming lamellipodia and depolymerization at rear, cytoplasm streams inside projection, adhesion complexes anchor to substratum via transmembrane proteins, propelling cell forward. Small GTPases Rac and Cdc42 regulate branching. Forms include lobopodia in Amoeba, filopodia in foraminifera, and reticulopodia in radiolarians. This crawling mechanism also mediates phagocytic capture of bacteria, distinguishing amoeboid motility from swimming via cilia or flagella requiring microtubules.
Ref: Alberts Molecular Biology Cell amoeboid locomotion pseudopodia actin; Campbell Biology 11th ed., Chapter 28 Protist motility pseudopods organization
Amoeboid protozoans live in fresh water, sea water, or moist soil. The NCERT textbook describes that they move and successfully capture their prey by putting out cellular extensions called pseudopodia (false feet), perfectly exemplified by Amoeba. Some marine forms even have protective silica shells on their surface, and certain forms like Entamoeba function as harmful parasites in humans.
Ref: NCERT Class 11 Biology > Chapter 2: Biological Classification > 2.2 Kingdom Protista
