When does fertilization occur? When a sperm cell unites with an egg cell.
When an egg cell undergoes meiosis.
When a sperm cell undergoes meiosis.
When non-disjunction occurs.

b exhibiting favoritism toward the kikuyu people.

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's