What is the name for the group of approximately 100 cells that forms from a fertilized egg?
a. placenta
b. blastocyst
c. chloroplast
d. stem cell

Blastocyst

Explanation:

The blastocyst represents blastula stage in mammals during the embryonic development. After fertilization, the formed zygote undergoes rapid cell division known as cleavage.

After cleavage the group of approximately 100 cells is produced. This is known as blastula, spherical layer of cells around a fluid filled cavity which is known as blastocoel.

In mammals, this stage of embryonic development is known as blastocyst.

answer; i believe the answer is hydraulic action;

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products