Question 19 What causes Folate deficiency?
sunscreen
UVB radiation
living near the North or South Pole
Excess vitamin D

How do living things obtain phosphorus

To confirm when to exclude children from school it’s recommended that you refer to guidelines from which of the following organizations

Apopulation of bears has genetic diversity. some of the bears have an allele that gives them thicker fur. due to climate change, the winters have gotten colder in their habitat. now the bears with thicker fur are becoming more common in the population. a.) which type of bear is selected for in the coldest ecosystem? b.) what must be the other allele for the type of fur, and what term would you use to describe the fact that the allele is becoming less common in the colder climate? c.) describe the change in the bear population in terms of changing allele frequencies and phenotypes d.) is this an example of natural selection