Helpp a biology quiz

Which is an example of a population?

People with one sickle cell allele are not likely to get malaria. what is this an example of?

What contributes to the high level of biodiversity found in wetlands? a. the large amount of available organic matter to organisms that are food for larger organisms b. the amount of available water for organism use c. the high nutrient availability d. all of the above select the best answer from the choices provided a b c d