They breathe through their skin. Air dissolves on the mucus of their skin, so they MUST stay moist to breathe. If worms dry out, they suffocate. As fresh air is taken in through the skin, oxygen is drawn into the worm's circulatory system, and the worm's hearts pump the oxygenated blood to the head area.
Answer: Bacterial cells can be genetically modified so that they have the gene for producing human insulin. As these modified bacteria grow, they produce human insulin.
Explanation:
I think what your answer is would be Amphibians? I could be wrong.
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Thermal energy causes matter to change state beacuse evrything has heat which is thermal energy hore heat is more thermal energy.
Ex.Ice changes into water
Ex.Water changes into water vapor
Answer:
combustible ....................
