Question

question 79
in vertebrates, this part of the brain varies in size and complexity, accounting for differences in computational and processing ability among major groups.
a brainstem
b frontal lobes
c cerebellum
d cerebrum
e hypothalamus

Explanation:

To solve this, we analyze each option:

• A. brainstem: Controls basic life functions (breathing, heart rate), size/complexity doesn’t relate to computational ability.
• B. frontal lobes: Part of cerebrum, involved in reasoning, planning, etc. But the question refers to a broader brain part varying in size/complexity for computational ability across vertebrates.
• C. cerebellum: Primarily for motor control and balance, not computational processing variation.
• D. cerebrum: The largest part of the brain in vertebrates, responsible for higher cognitive functions (learning, problem - solving, processing). Its size and complexity vary greatly across vertebrate groups (e.g., more complex in mammals), explaining differences in computational/processing ability.
• E. hypothalamus: Regulates hormones, body temperature, etc., not related to computational ability variation.

Answer:

D. cerebrum