What three genotypes are possible using the two hemoglobin alleles from this lab, sickle cell (HbS) and normal (HbA)?

Me the formula cacl2 represents the compound

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.