antibodies
An element is a substance in its pure and natural form.
a natural substance is something that is found again and again in many different forms eg. salt (also a reoccurring substance)
Natural gas, gasoline, and kerosene are some fuels made from petroleum.
Bacteria is the answer
Diamonds.
Diphtheria is a disease caused by a bacteria. It is entirely natural, unfortunately.
No since paper is composed of a natural substance (cellulose) which is easily degraded by various bacteria.
A toxin is a substance that can injure living tissues. Toxins may be natural (e.g. from plants or bacteria) or human-made.
Simply by living and breathing in their natural habitat, all fish create ammonia. In order for fish to live, nature in its wisdom created (evolved) specific water born bacteria to convert this poisonous substance into harmles Nitrate that water plants can use. That is the reason why all tanks containing fish must have a 'cycled' filter to house the bacteria and convert the ammonia.
Ecoile and Natural Bacteria (Which form some natural springs)
An element is a substance in its pure and natural form.
A poisonous substances of natural origin produced by an animal is called venom.
a natural substance is something that is found again and again in many different forms eg. salt (also a reoccurring substance)
The spectrum of light produced by the sun
sunlight
Yes.
Natural gas, gasoline, and kerosene are some fuels made from petroleum.