The bond that is created in H2O is called a covalent bond.
Ecology is one component of Environmental Science that studies organismal interactions.
So your answer is c. interactions
Because it determines if it is isolated or not. This means if other substances can enter or not. This usually relies on the membrane with it´s pores. The pores help the membrane be selectively permeable in what it lets in and out.
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It begins to decompose into water and carbon dioxide gas.