Which muscle has 3 muscle "heads' or points of origin that is responsible for straightening the arm? O Abdominals
O Biceps
O Triceps
O Gluteus Maximus​

The triceps brachii gets its name because it contains three muscle 'heads' or points of origin. These include the: Medial head. Lateral head.

Explanation:

sorry if i am wrong

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.