Species A and B are closely related animals with similar body size. Match the information with the likely brain size.
1: Species A lives in the rainforest.
2: Species B lives in open plains.
3: Species B cares for its juvenile offspring.
4: Species A leaves its parents after birth.
5: Species A stores surplus food for later.
6: Species B eats only what is currently growing

Question

Species A and B are closely related animals with similar body size. Match the information with the likely brain size.
1: Species A lives in the rainforest.
2: Species B lives in open plains.
3: Species B cares for its juvenile offspring.
4: Species A leaves its parents after birth.
5: Species A stores surplus food for later.
6: Species B eats only what is currently growing

BlackTom AI · Accepted Answer

To determine brain size associations, I will evaluate each statement about Species A and B and connect ecological or behavioral demands to what is typically linked with larger versus smaller brains.

Statement 1: Species A lives in the rainforest. In rainforest environments, animals often rely on diverse and complex foraging strategies and navigating a structurally dense habitat. This can favor greater cognitive abilities and hence a relatively larger brain to process complex information and make flexible decisions. Therefore, this aligns with Larger brain size.

Statement 2: Species B lives in open plains. Open plains can be relatively simpler in terms of foraging routines and fewer spatial navigation constraints compared to dense forests. This setting can correspond to a smaller brain size, given potentially lower cognitive demands for environmental processing. Thus, this matches Smaller brain size.

Statement 3: Species B cares for its juvenile offspring. Parental care typically requires extended social investment, learning, memory, and problem-solving to raise offspring successfully, which are associated with larger brains. This supports Larger brain size for Species B.

Statement 4: Species A leaves its parents after birth. Early independence can indicate less reliance on extended parental care, which reduces the cognitive load associated with caregiving and social monitoring. This scenario is more consistent with a smaller brain size for Species A.

Statement 5: Species A stores surplus food for later. Food storage and planning ahead involve forward-thinking and memory—cognitive skills that are often linked to larger brains. Therefore, this points to Larger brain size for Species A.

Statement 6: Species B eats only what is currently growing. A strict, immediate-foraging strategy that depends less on long-term planning or memory tends to align with lower cognitive demands, suggesting a smaller brain size for Species B.

In summary, the reasoning across statements implies a pattern where statements 1, 3, and 5 are associated with Larger brain size, while statements 2, 4, and 6 align with Smaller brain size. The underlying idea is that ecological complexity, parental care, and the need to plan or remember food storage generally drive higher cognitive demands and brain size, whereas reliance on immediate resources and simpler foraging needs correspond to smaller brains.

BIOL 1001 (090-095) Unit 3.2 Learning Quiz: Human origins

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