For many years, the evaluation of water quality of north carolina streams was defined in chemical terms, ignoring the biological component. more frequently now, the bioindicator is used to evaluate stream quality. what is the biotic index? a)the bioindicator is a scale based on algae levels, used to measure water quality in streams. b)the bioindicator is a scale based on fungus levels, used to measure water quality in streams. c)the bioindicator is a scale based on coliform bacteria levels, used to measure water quality in streams. d)the bioindicator is a scale based on the tolerance value of macro-invertebrates in an environment, used to measure water quality in streams.

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.