In all animal species:
a) females provide equal or more parental care than do males.
b) males have greater variation in number of offspring than do females.
c) development of the fetus after fertilization takes place inside the female.
d) the average number of offspring for males and females is the same.
e) None of the above is true; there are no universal statements that can be made about mating systems in all animal species.
Answer: d) the average number of offspring for males and females is the same.
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