Excess tears are initially drained from the surface of the eyes by the
a. lacrimal puncta
or
b. lacrimal sacs

Alaska and northern canada have a diet rich in vitamin d and their skin color is darker than predicted on the basis of iv intensity at their latitude. explain the observation:

Four types of motile cells in human body?

What type of weather does tropical continental air bring in summer? hot and cloudy cool and sunny hot and sunny cool and cloudy