Using energy to build up or break down organic molecules
what is that?

Metabolism involves either using energy to build organic molecules or breaking down organic molecules in which energy is stored. ... Therefore, an organism's metabolism is part of Earth's carbon cycle.

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Happy Halloween!!!

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.