Which of the following structures represents the fusion of the interproximal junctional epithelia of two adjacent posterior teeth?

A plan should be developed for loss control to remove water from a catchall as soon as it is constructed, especially if:

a. there is a constant flow of water into the catchall. b. it is connected to a short chute. c. the volume of water is greater than catchall's capacity. d. it takes more than one nozzle hose to extinguish the fire.

Which of the following vitamin deficiencies may cause pernicious anemia?

Vitamin B1 Vitamin B2 Vitamin B6 Vitamin B12