Answer:
Chemical Reactions. ... Reactions occur when two or more molecules interact and the molecules change. Bonds between atoms are broken and created to form new molecules.
External fertilization in animals usually occurs in water or in damp areas in a process called spawning.
Energy released from cell respiration is know as ATP
Answer:
a. 4 sig figs
b. 3 sig figs
c. 2 sig figs
