I will give 20 points plz i need help Which causes genetic variations and can result in different alleles?

predation rate

random mutations

competition

environmental changes

How many moles of al3+ ions are in 1.25 moles of al2o3

If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d