Biology · Evolution
Which one of the following statements about the evolution of the vertebrate brain is most accurate?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The cerebellum, involved in motor coordination, has remained largely unchanged throughout vertebrate evolution because motor function is highly conserved.
- 2Brain regions can evolve independently in response to specific ecological or behavioural demands, rather than all regions scaling uniformly with overall brain size.✓
- 3Increased brain size in birds and mammals is always accompanied by longer lifespans and slower reproductive rates, without exceptions.
- 4The relative size of the neocortex in primates is primarily determined by the absolute size of the brain and not by social or ecological pressures.
Correct answer
Brain regions can evolve independently in response to specific ecological or behavioural demands, rather than all regions scaling uniformly with overall brain size.
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