Answer:
many
pollution by dumping chemical that are harmful to the animals
littering by plastic
accidentally introducing invasive species
over fishing
it lowers the biodiversity of the aquatic ecosystems living there
Explanation:
<h3>
Answer:</h3>
Vertebrates have backbones, while invertebrates do not.
Humans, for example, are vertebrates because we have backbones.
Answer:
Air and noise pollution can occur both indoors and outdoors. They can have natural sources or be released from anthropogenic sources. Scientists have found different ways to reduce the amount of sulfur dioxide released from coal-burning power plants. ... another option is to wash the coal to remove some of the sulfur.
Explanation:
Sulfur Dioxide
Because you cannot test it or observe it.
A scientific theory are created through the scientific method, in the scientific method you need to be able observe it and experiment.
Answer:
a gated sodium channels open and sodium ions flood into the cell