Which of the following does these actions? "Creates a physical barrier: Regulates the flow of materials into and out of the cell. Recognizes
chemical signals; Creates structure" *
A. vacuoles
B. prokaryotic Cells
C. cell membrane

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

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation: