Directional Selection Has Eliminated Sickle-Cell Anemia from All Human Populations,except

question 57

True/False

Directional selection has eliminated sickle-cell anemia from all human populations,except those in regions where diabetes is endemic.

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Definitions:

Flatworms

A group of invertebrates belonging to the phylum Platyhelminthes, known for their flat bodies and absence of body cavity.

Malpighian Tubules

Excretory structures found in some arthropods, including insects and spiders, that remove waste products from the blood and excrete them into the digestive tract.

Nephridia

Excretory organs in many invertebrates, functioning in the elimination of metabolic wastes.

Insects

Small arthropods with a chitinous exoskeleton, three-part body, three pairs of jointed legs, compound eyes, and one pair of antennae.