The map shows the allele frequency of sickled hemoglobin and malaria endemicity in Africa. Which statement best explains the relationship between allele frequency and malaria endemicity in Africa?
When an area is malaria free, the allele frequency is between 0 and 2.02.
When an area is holoendemic, the allele frequency is between 0.52 and 4.04.
When an area is malaria free, the allele frequency is between 12.64 and 18.18.
When an area is holoendemic, the allele frequency is between 0 and 0.51.

Listed in the item bank are some key terms and expressions associated with the categories seen in the venn diagram. to find out more information about items, some have more details available when you click on them. drag and drop each item onto the proper area of the diagram. if an item describes more than one category, be sure to place it in the overlapping space. viruses are tiny infectious pathogens that cause many different diseases, such as polio, and the flu. though they are similar to one celled organisms in some ways, in many ways they are very different. use the venn diagram below to show the similarities and differences between viruses and living organisms.

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled

Math focus 4. calculate a map has index contours at 250 m, 500 m, and 750 m. what is the contour interval?