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If a brain grows at a slow rate it will reach adult size at a young age.
In humans, the fastest rate of brain growth occurs:
Before birth
During adolescence
During childhood
Human brains reach adult size around age
12
6
20
Human brains grow at a faster rate than chimpanzee brains.
Brain size at birth is constrained by
The size of the birth canal
Mother's height
As the energy used for brain growth decreases
Brains get smaller
The energy used for body growth decreases
The energy used for body growth increases
You are comparing the growth of the brain in two primate species. Species 1 has a smaller adult brain than Species 2. The brain of species 1 grows at a faster rate and for a shorter time than the brain of species 2. Which species attains adult brain size at a younger age?
Species 2
Species 1
