A.   The number of gametes females can produce

B.   The number of males who are available for mating

C.   Food availability

D.   All of these statements are correct

A.   Gaining more access to resources by being successful in competition with other females

B.   Gaining more access to resources by cooperating with other females

C.   Finding the optimal amount of care to invest in offspring

D.   All of these statements are correct

A.   Allomaternal care is more likely

B.   Males invest more in care of offspring than females do

C.   The more females invest in the care of their offspring, the less time and resources they have to devote to future offspring

A.   Both of these responses are correct

B.   favors traits that make individuals more successful in competition for access to mates

C.   favors traits that make individuals more attractive to the opposite sex

A.   How long a monogamous pair bond lasts

B.   Tail length

C.   Reproductive success

A.   In one-male/multi-female groups

B.   False; males never invest in offspring

C.   In species that have enduring pair bonds

A.   In polyandrous groups

B.   In one-male/multi-female groups

C.   In multi-male/multi-female groups

A.   Humans are present

B.   Monogamy is common

C.   Variation in reproductive success is the highest for males

A.   Temporary

B.   Occurs because nursing requires an enormous amount of calories

C.   All of these statements are correct

D.   Ends when offspring are weaned

A.   During the rainy season

B.   When a new female enters a group

C.   When a male increases in rank