Emma bends and straightens her arms while lifting weights. Which body systems work together to make this happen? a
Nervous and skeletal

b
Muscular and endocrine

c
Skeletal and muscular

d
Nervous and endocrine

c

Explanation:

the correct option is option a

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.