Which of the following is true about imprinting? a. it is often used in the training of adult animals. b. it always involves the sense of sight. c. it is restricted to birds. d. it occurs during a specific time in young animals.

The spermists believed that: the male made the only hereditary contribution to the offspring the male and female traits were blended in the offspring the female made the only hereditary contribution to the offspring the male and the female made equal contributions to the next generation