1 Mechanical digestion is evident, where one can see the breaking down of large food particles into smaller ones after being ground by the teeth. 2  While the chemical changes that take place happen within the body and are not visible.
Using a pre-emergent herbicide around your property could stop these territorial plants from overtaking your home's most valued green space. Pre-emergent herbicide is a type of weed killer that prevents weed seeds from sprouting. Unlike normal herbicide, it is meant to stop weeds from growing in the first place by spraying or spreading a chemical onto the soil so that weeds have difficulty placing down their roots.
Definition of emergent. 1  1a : arising unexpectedlyb : calling for prompt action : urgent emergent danger. 2  2a : rising out of or as if out of a fluid emergent coastal islandsb : rooted in shallow water and having most of its vegetative growth above water an emergent plant. 3  3 : arising as a natural or logical consequence.