Compared to peas, fruit flies were thought to have no variations, until the discovery of a fly by

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?

Vinegar has a ph of 3, and household ammonia has a ph of 11. is the concentration of h+ greatest in the vinegar or ammonia?