Answer to Question 1
d
Answer to Question 2
Vegans are at special risk for undetected vitamin B12 deficiency for two reasons: first, they receive none in their diets, and second, they consume large amounts of folate in the vegetables they eat. Because the body can store many times the amount of vitamin B12 used each day, a deficiency may take years to develop in a new vegetarian. When a deficiency does develop, though, it may progress to a dangerous extreme because the deficiency of vitamin B12 may be masked by the high folate intake. Worldwide, vitamin B12 deficiency among vegetarians is a growing problem. A pregnant or lactating vegetarian woman who eats no foods of animal origin should be aware that her infant could develop a vitamin B12 deficiency, even if the mother appears healthy. Breastfed infants born to vegan mothers with low concentrations of vitamin B12 in their breast milk can develop severe neurological symptoms such as seizures and cognitive problems.
Where mangrove diversity is high, mangrove species show clear patterns of vertical zonation relative
Gecarcinus quadratus, a land crab from Central and South America
These adolescents have just graduated and look forward to moving on from high school and adolesence
Mars sketched as observed by Lowell sometime before 1914. (South top)
Patterns of North American Religion
High net primary productivity