In lagomorph dental development, when are deciduous premolars and molars replaced?

In lagomorph dental development, when are deciduous premolars and molars replaced?

• A. Deciduous premolars replaced at 2 weeks; Molars replaced at 4 weeks
• B. Deciduous premolars replaced at 4 weeks; Molars replaced at 4 weeks
• C. Deciduous premolars replaced at 4 weeks; Molars replaced at 2 weeks
• D. All teeth replaced by 6 weeks

Answer: (B)

Timing of replacement of deciduous cheek teeth in lagomorphs. In these animals, the deciduous premolars and molars are replaced by their permanent counterparts at about 4 weeks of age. This timing supports the shift from a milk diet to solid feed by ensuring the cheek teeth that do the grinding are fully functional as the animal begins to wean. The molars and premolars emerge in a way that maintains proper occlusion and chewing efficiency as the jaw grows. Replacing them earlier (around 2 weeks) would be premature for functional chewing, while waiting until 6 weeks would leave the animal with inadequate grinding surfaces during the critical early digestive period.

Timing of replacement of deciduous cheek teeth in lagomorphs. In these animals, the deciduous premolars and molars are replaced by their permanent counterparts at about 4 weeks of age. This timing supports the shift from a milk diet to solid feed by ensuring the cheek teeth that do the grinding are fully functional as the animal begins to wean. The molars and premolars emerge in a way that maintains proper occlusion and chewing efficiency as the jaw grows. Replacing them earlier (around 2 weeks) would be premature for functional chewing, while waiting until 6 weeks would leave the animal with inadequate grinding surfaces during the critical early digestive period.