Please help! Drag each tile to the correct box.
Arrange the processes in the order they occur during embryonic development and cell differentiation.
1. formation of the lining of the digestive tract
2. development of heart muscle cells
3. fusion of the sperm and egg
4. differentiation of inner cell mass
5. development of the morula

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.