Question 5. Suppose that brain performance in these birds is tied most closely t

Question

Question 5.

Suppose that brain performance in these birds is tied most closely to the number of brain cells adjusted for body size. Based on the relationship between cell size and genome size, would you expect the relationship between the number of brain cells (adjusted for body size) and genome size to be stronger or weaker than the relationship between brain size (adjusted for body size) and genome size? Why?

Question 6

From the information presented, can we infer that the reduction of genome size in some parrots enabled them to have larger brains? Why or why not?

Explanation / Answer

Question 5

The relationship between the number of brain cells (adjusted for body size) and genome size to be stronger than the relationship between brain size (adjusted for body size) and genome size.

Because, the graphs shows a inverse relationship between the genome size and brain volume (Brain size). Whereas, the other graph shows a positive correlation between the genome size and dry cell area (number of brain cells). The positive correlation makes them stronger.

Question 6:

No.

The graph is plotted for relative brain volume. To infer that the reduction of genome size in some parrots enabled them to have larger brains, we need absolute brain volume.

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