Describe and contrast four different mechanisms of movement in four different classes of protists, Amoeba, Paramecium, Euglena, and Diatoms.

Amoeba: Amoeba moves with the help of pseudopodia. The pseudopodia are known as false feet of the amoeba as they are actually protrusions of the cytoplasm.

Paramecium: Movement in the paramecium is assisted by the cilia, which are hair like projections covering the outer body of the paramecium. The movement of the cilia moves the paramecium body forward or backwards.

Euglena: Movement in Euglena is assisted by structures called flagellum. The flagellum are a thread like structure which causes whipping movement in euglena.

Diatoms: DIatoms have structures called raphe for movement. It allows the diatoms to move over surfaces.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101