Which of the following objects would best be used to understand how the human heart works?
A.
coffee filter
B.
block of wood
C.
plastic bag
D.
water pump

option c is the correct answer.

the flagellates share a facultative mutualist association with termites. mutualism is a biological interaction between individuals of different species, where both benefit from each other. this is called cooperation and it differs from other interactions such as cases of exploitation, such as parasitism, predation. in this interaction called association, both species cooperate and benefit.