NEET BIOLOGY

Detailed explanation-1: -Movement occurs when the cytoplasm slides and forms a pseudopodium in front to pull the cell forward. Some examples of organisms that exhibit this type of locomotion are amoebae (such as Amoeba proteus and Naegleria gruberi, ) and slime molds, as well as some cells in humans such as leukocytes.

Detailed explanation-2: -Amoeboid cells crawl using pseudopods, which are convex extensions of the cell surface. In many laboratory experiments, cells move on a smooth substrate, but in the wild cells may experience obstacles of other cells or dead material, or may even move in liquid.

Detailed explanation-3: -protozoans. Amoeboid movement is achieved by pseudopodia and involves the flow of cytoplasm as extensions of the organism. The process is visible under the light microscope as a movement of granules within the organism. The basic locomotory organelle is the pseudopodium.

Detailed explanation-4: -Cells like macrophages and leukocytes show amoeboid movement wherein pseudopodia are formed by cytoplasmic streaming. The cytoplasm is projected outwards giving a dragging or crawling movement to the cell and to organisms like amoeba. This is done by the cytoskeletal components like microfilaments.

Detailed explanation-5: -This type of movement is observed in amoebae, slime molds and some other protozoans such as Naegleria gruberi, as well as some cells in humans such as white blood cells.