Which of the following is true regarding parent”offspring conflict?
a. Weaning is an example of parent”offspring conflict, and this transition reflects a
fundamental symmetry in the genetic interests of mothers and offspring.
b. A mother is equally related to each of her offspring; in contrast, an offspring is at
most 25% related to its siblings but is 100% related to itself.
c. A mother is motivated to wean her current infant so she can begin investment in her
next infant, but the infant will resist its mother’s attempts at weaning because it is not in
its genetic best interest.
d. Parent”offspring conflict only occurs in primates because reproductive costs are
higher than for other mammals.
A primitive trait of Homo ergaster is
a. large browridges.
b. a small brain.
c. a vestibular system similar to that of quadrupedal primates.
d. short legs, long arms, and curved fingers.
Why did Darwin’s contemporaries believe that natural selection could not move a
population beyond its initial range of variation?