Will mark brainliest! 1. what should photographers take into consideration before shooting sunrise and sunset

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

What is usually (but not always) related to the metabolic processes of living organisms in its organic form?