ASB 101 EXAM 2 Pt 1
Study online at https://quizlet.com/_i212sn
1. How does childhood growth and age of sexual maturity differ between
chimps and humans?: Human children in hunter-gather populations are weaned around 2.5 years of age
but chimpanzees are not weaned until age 4-5. From age 5 to 10 chimpanzees grow much faster than humans.
2. What is mean expected adult lifespan (after age 15) for chimps and humans?-
: 15 year
old chimpanzees have on average about
another 15 years of life left, whereas human
hunter-gatherers of the same age have a
mean adult lifespan almost 3 times that long
(40 more years on average).
3. What is reproductive value at birth?: The total expected lifetime reproductive output of
an individual at birth is called reproductive value at birth or V0.
4. What is the probability of survival to age 70 for hunter-gatherers?: 20-30%
5. What is the typical difference between males and females in mortality rate?
What does testoterone have to do with this difference?: Among mammals males die at
higher rates than females. --males take high
risks to achieve greater mating success, & they use energy in a way that
gives them lower disease resistance (building muscles with testosterone
compromises the immune system).
6. What is the main difference between male and female age specific fertility
curves in humans?: The age-specific fertility curve in
traditional populations shows a
peak for females at around ages
20-30, and a peak for males
several years later.
7. What are 4 implications of the V0 equation?: Anything that can affect future survival or
fertility is worth less than anything that affects current
survival and fertility. - humans discount things far into the
future relative to things that can happen now. 2) Since lx is a cumulative measure anything that affects mortality early
in
the lifespan will have a huge impact on fitness. (all future fertility will be lost if
you die now). 3) Conversely, survival is not strongly favored by natural selection near
1/3
Study online at https://quizlet.com/_i212sn
1. How does childhood growth and age of sexual maturity differ between
chimps and humans?: Human children in hunter-gather populations are weaned around 2.5 years of age
but chimpanzees are not weaned until age 4-5. From age 5 to 10 chimpanzees grow much faster than humans.
2. What is mean expected adult lifespan (after age 15) for chimps and humans?-
: 15 year
old chimpanzees have on average about
another 15 years of life left, whereas human
hunter-gatherers of the same age have a
mean adult lifespan almost 3 times that long
(40 more years on average).
3. What is reproductive value at birth?: The total expected lifetime reproductive output of
an individual at birth is called reproductive value at birth or V0.
4. What is the probability of survival to age 70 for hunter-gatherers?: 20-30%
5. What is the typical difference between males and females in mortality rate?
What does testoterone have to do with this difference?: Among mammals males die at
higher rates than females. --males take high
risks to achieve greater mating success, & they use energy in a way that
gives them lower disease resistance (building muscles with testosterone
compromises the immune system).
6. What is the main difference between male and female age specific fertility
curves in humans?: The age-specific fertility curve in
traditional populations shows a
peak for females at around ages
20-30, and a peak for males
several years later.
7. What are 4 implications of the V0 equation?: Anything that can affect future survival or
fertility is worth less than anything that affects current
survival and fertility. - humans discount things far into the
future relative to things that can happen now. 2) Since lx is a cumulative measure anything that affects mortality early
in
the lifespan will have a huge impact on fitness. (all future fertility will be lost if
you die now). 3) Conversely, survival is not strongly favored by natural selection near
1/3
