Blood does not enter or leave the ventricles during the period called
a. ejection.
b. rapid filling.
c. atrial systole.
d. isovolumic contraction.
e. active and passive filling.

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in

i'm sorry, but can you list the answers? i cannot with something i don't know the answers to

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chris