The kidneys can regulate water levels in the body; they conserve water if you are dehydrated, and they can make urine more dilute to expel excess water if necessary.
Yes, humans are a keystone species by virtue of their technology<span> as well as the manner in which they influence their natural habitat. If humans were to become extinct, pets, </span>livestocks<span>, and crop plants would also follow. On the other hand, the species that would likely grow in number would be mountain </span>gorillas, whales and weeds. <span> </span>
There's a lot of compounds but one really known one is H2O because it's made out of hydrogen and oxygen atoms.
C. Changes to biodiversity can positively and negatively affect an ecosystem.
