Lecture 12: Evolution of the Vertebrate Brain: Conserved vs. Novel Features

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12 Questions

What does brain size mainly provide a rough estimate of?

Number of neurons

In terms of brain size and neurons, what does a bigger brain not necessarily mean?

More neurons

How does increased brain size affect behavioral flexibility according to the text?

Improves fine-tuning to changing circumstances

What can change with increased brain size, leading to greater adaptability?

Number of connections between subcomponents

Which statement best describes humans in relation to brain size among mammals?

They have the brainiest order of mammals

Among primates, how do humans rank in terms of braininess?

Most brainy

What is a problem with the scala naturae view when considering the vertebrate brain?

It only looks at brain size, ignoring the basic organization of the vertebrate brain.

Why is it mentioned that a blue whale having a larger brain compared to a baboon is not necessarily indicative of evolutionary progress?

Because the blue whale has a larger body size, which influences its brain size.

What does the availability of extra neural tissue in the baboon imply?

The baboon's brain may have a greater processing capacity than expected for its body size.

What percentage of energy (oxygen) does a fish's brain typically consume relative to its body mass?

60%

How does the relationship between brain size and body size change as overall body size increases?

Brain size increases at a fraction of body size, ranging between 0.67 and 0.75.

What does the equation Y = aX^b describe in relation to brain and body sizes?

The mathematical representation of how brain size changes concerning overall body size.

Explore the evolution of the vertebrate brain, comparing conserved and novel features across different taxa. Delve into the challenges with the scala naturae view, which only considers brain size and overlooks the underlying basic organization of vertebrate brains.

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