Question

question 3(multiple choice worth 3 points)
(05.03 mc)
which of the following correctly describes the general trend in the evolution of hominid teeth?
o molars have become larger and flatter as the hominid diet became more reliant on plant materials.
o canines have increased in size as hominids developed more effective hunting techniques.
o tooth size has decreased as hominids evolved toward the use of tools.
o tooth size has increased as the hominid evolved toward a larger brain cavity and skull.

Explanation:

To solve this, we analyze each option:

• Option 1: Early hominids' diet shifted to more meat (with tools), so molars didn't get larger for plants. Incorrect.
• Option 2: As hominids used tools for hunting, canines reduced (no need for large canines in combat/hunting). Incorrect.
• Option 3: With tool use, hominids processed food (e.g., cutting, grinding), so teeth didn't need to be large. Tooth size decreased. Correct.
• Option 4: Tooth size and brain cavity/skull size aren't directly related in this way. Incorrect.

Answer:

C. Tooth size has decreased as hominids evolved toward the use of tools