Which organisms have pharyngeal arches that develop from all three germ layers and go through the same development stages as embryos? birds ladybugs starfish snakes

The answer is A. Other characteristics of this phase;

1.       crossing-over (the physical exchange of chromosome parts) occurs

2.       Chromosome strands coil and become shorter and thicker and visible under the light microscope.

3.       Spindle forms between the two pairs of centrioles as they migrate to opposite poles of the cell.