The right answers are B, C and D.
An enzyme is a protein with catalytic properties. Virtually all biomolecules capable of catalyzing chemical reactions in cells are enzymes; some catalytic biomolecules, however, consist of RNA and are therefore distinct enzymes: they are ribozymes.
An enzyme acts by lowering the activation energy of a chemical reaction, which increases the rate of reaction.
Ok, so a hypothesis is an educated guess. When conducting an experiment, scientists test their hypothesis. And if their hypothesis is correct, it becomes a theory.
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Hurricane Katrina caused oil spills which spilt out into the water harming a lot of animals. The storm caused a lot of erosion in most area that already had a bit of erosion. The gulf water killed a lot of vegetation in fresh water wetlands
