Explain how current and oxygen content affect the biodiversity of streams and rivers.

The current determines the location of the organisms.

In streams or rivers which have fast currents, the only organisms tend to survive which have the mean to anchor themselves.

Most of the organisms tend to live at the bottom of the river or stream as swimming against the currents would require a lot of energy.

Oxygen content is also the factor which influences the location of organisms in an aquatic system.

The oxygen content at the source of the streams or rivers is higher as compared to the mouth of the river.

Consequently, the organisms which require more oxygen tend to find at the source of the rivers whereas the organisms which require less oxygen tend to find at the mouth of the river.

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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.