Question

As a fertilized egg divides, the cells differentiate because they —
contain a lipid bilayer
can clump together
metabolize sugars rapidly
have specific genes activated

Answer 1

Answer will be - specific gene activated

Explanation:

• After fertilization the cell continue to divided. Initially it is under control of maternal gene. but when it produced about more than 100 cells it will start to expressing new gene.
• differentiation is last overt stage where specialized cell type is produced from undifferentiated cell.
• Initially the zygote remain as undifferentiated cells. When the cell progress through several stage of cell division, only tissue or cell specific genes  get activated in a particular tissue or in a particular cell and give rise a particular differentiated cell type depending on which gene is activated in those cells.