Question

1.

Primate females always invest in their young because

primate males do not have the appropriate neurological foundation.

they produce large, nutrient-rich gametes.

parenting effort is equal to mating effort.

they are committed to parental investment by their physiology.

2.

Which of the following is true of primates in general?

One-male, multifemale groups have less dimorphism in body size than do pair-bonded species.

Pair-bonded groups have the least amount of sexual dimorphism in body size.

Multimale, multifemale groups tend to have greater sexual dimorphism than one-male, multifemale groups.

Multimale, multifemale groups are not dimorphic in body size.

3.

Birds and mammals have very different typical reproductive strategies. What is a key reason for this?

Birds are not as highly evolved as primates, so they have simple undifferentiated mating systems mostly involving male songs and calls.

Because they can fly, birds do not experience limitations on food availability and therefore undergo mainly sexual selection and almost no natural selection.

In birds, both males and females can provide a great deal of parental investment for the young, because both can incubate the egg(s) and both can bring food to the chick(s).

4.

Male reproduction is limited by

the number of fertile females.

food availability.

the number of sex cells a male produces.

Thanks!

Answer 1

Ans 1)Female primates are heavily invested in their offspring, because they are committed to parental investment by their physiology. Female primates lactate where as males do not , their is a difference in physiology of males and females , thats y females invest better in young ones. Correct answer is D

Ans 2)A few primates are monogamous. That means they mate in an pair-bond until one of the pair dies. The species that are monogamous have minimal sexual dimorphism.

Correct answer is B

Paor bonded groups have leaat amount of sexual dimorphism

Ans 3)in  birds, both males and females can provide a great deal of parental investment for the young, because both can incubate the egg(s) and both can bring food to the chick(s

Ans 4) male reproduction us limited by the no. Of fertile females .

males compete among themselves for access to females, whereas females tend to be choosy and mate only with preferred males.