Human Evolution

Question 1

Placental mammals

Answer 1

have placenta, fetus grows in body, Eutherians, most widespread group
-successful in all environments because placenta is very efficient

Question 2

Placenta

Answer 2

new organ females grow to help fetus grow

Question 3

Disadvantage of placenta

Answer 3

larger energy expenditure, birth is risky, more susceptible to predators

Question 4

Primates

Answer 4

very diverse, largest is the mountain gorilla and smallest is mouse lemur

Question 5

Characteristics of primates

Answer 5

rotating shoulder joint, big toe/ thumb separate from others, stereoscopic vision=improved depth perception