What is one limitation of a CPR mannequin?

The chest cannot rise and fall when CPR is performed on a mannequin.

Explanation:

In CPR training, one of the main necessities for performing CPR is letting the chest rise and fall.

The reason this detail is important is so you can make sure the victim's lungs are working properly and to see to it that you're completing the resuscitation procedure properly.  

If the chest doesn't rise and fall, it can lead to even more severe problems because first, you may be doing it wrong, or second, there may be a rip or tear in the lung organ or the windpipes.

answer; ///i believe the correct answer is (aids) acquired immune deficiency syndrome;

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.