Question

The amoeboid movement results from:
a) Interactions among actin, myosin and ATP, etc.
b) coordinated beats of cilia
c) whip like action of flagella
d) action by the mitotic spindle, similar to what happens during mitosis and meiosis.

Answer 1

Amoeba, often referred to as amoeboid, is a type of cell or unicellular organism that has the ability to alter its shape, primarily by extending and retracting pseudopods. Amoebae do not form a single taxonomic group; instead, it is found in every major lineage of eukaryotic organisms.

Complete answer:
Amoeboid motion is the most common mode of locomotion in eukaryotic cells. It is a creeping type of movement achieved by protrusion of a cell cytoplasm involving the formation of pseudopodia ('false-feet') and posterior uropods.
One or more pseudopodia may be produced at a time depending on the organism, but any amoeboid movement is characterized by the movement of organisms with an amorphous form which do not have fixed motility structures. Movement occurs when the cytoplasm slides and forms a pseudopodium to pull the cell forward.
This type of movement has been linked to changes in the potential for action, although the exact mechanism is still unknown. Examples of organisms exhibiting this type of locomotion are amoebae (such as Amoeba proteus and Naegleria gruberi) and mucosa, as well as some human cells such as leukocytes. Sarcomas, or cancers caused by connective tissue cells, are particularly adept at amoeboid movement, thus leading to their high rate of metastasis.
Interactions between microfilaments (actin), myosin and ATP usually result in ameboid movement.

So, the correct answer is option A: Interactions between actin, myosin and ATP, etc.

Note:
The protoplasm of the amoeba consists of an outer layer called an ectoplasm that surrounds the inner portion of the endoplasm. The ectoplasm consists of a semisolid gel called a plasma gel, while the endoplasm consists of a less viscous fluid called a plasma sol. The ectoplasm owes its highly viscous state, in part, to the interlinking actomyosin complex.