Antibody molecules and receptor molecules are similar in that they both (1) control transport through the cell membrane
(2) have a specific shape related to their specific function
(3) remove wastes from the body
(4) speed up chemical reactions in cells

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the

Iwould say overuse ( but not 100% sure ) in the u.s. we tend to overuse water by leaving it running, throwing it away, taking long showers, etc.

The littoral zone. . .