Afever is a response to infection that helps the body to maintain homeostasis Which body systems work together to detect and fight infection and regulate temperature? immune and circulatory
respiratory and nervous
immune and respiratory
circulatory and respiratory

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.

Food contains a sugar called ( ), which is broken down in a process called cellular ( ). this process uses ( ) to break down food molecules and provide energy for cells. fill in the parentheses

Can a trait be both polygenic and have multiple alleles? explain why or why not.