1. The term morula is used for a solid cluster of cells generated by the cleavage of the zygote. This cluster is made up of (a) 4–8 cells, (b) 8–12 cells, (c) 12–16 cells, (d) 60–80 cells.  2. The...

1. The term morula is used for a solid cluster of cells generated by the cleavage of the zygote. This cluster is made up of (a) 4–8 cells, (b) 8–12 cells, (c) 12–16 cells, (d) 60–80 cells.

 2. The outer layer of the blastocyst, which attaches to the uterine wall, is the (a) yolk sac, (b) trophoblast, (c) amnion, (d) inner cell mass.