What methods of locomotion are used in protozoans?
protozoans like amoeba move with the help of finger like projections called pseudopodia.
Plankton are very small, microscopic plants and animals. They have little or no power of locomotion and float in surface waters. They are found in fresh and salt water. Planktonic animals include protozoans. While they are often referred to as one-celled animals, they have characteristics found in both plants and animals. Most protozoans cannot be seen without a microscope. There are about 30,000 species of protozoans that have been identified so far!
Arthropod locomotion varies depending on the environment. Arthropods have legs for walking and perching; flight-capable insects use wings; aquatic arthropods often have swimmeretes like shrimp, krill, and others. Because of the hard exoskeleton, all modes of locomotion depend on jointing to provide the degree of freedom reflected in the particular appendage used for locomotion.