EVERYONE IT IS TIME TO RISE UP AND TAKE DOWN THE MODS. I had only had my account for six days and it got removed. If you are tired of your answers always getting taken down copy this question and post it as many times as you can. We will NOT stand for this. If you get banned make another account. If they take down your question post it again. Mods, listen to me and listen well WE HAVE HAD ENOUGH.

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.

'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.