Certain species of aquatic organisms are particularly sensitive to environmental changes. Scientists often monitor the behavior, population size, and overall health of these so-called indicator species in order to evaluate the water quality in an ecosystem.

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying

it is stable as it is in group 0 which have full outer shells of electrons

the answer is c.the valence of the atoms combine .