. 2. Which of the following genetic disorders occurs in the highest amount in the United States?
• sickle cell anemia
• Tay-Sachs
• cystic fibrosis
• Huntington's disease
• Hemophilia A

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla

1. fold your hands together so your thumbs cross over ,and look at your thumbs. which thumb feels most "comfortable" on top is actually controlled by a gene. the left thumb folding over the right thumb is a domi