Enzymes a) are composed of long chains of fatty acids b) can be destroyed by variations in temperature or ph c) are used up, in the process of performing a chemical reaction d) raise the amount of energy required to start a chemical reaction

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a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.

the atomic number of magnesium is 12. its nucleus must contain 12 protons and no electrons. the atomic number of an atom is determined by the number of protons.

magnesium is an electrolyte injection commonly used to treat low magnesium levels in your blood. it is also used to prevent or control seizures in women with preeclampsia or eclampsia.