No, there are lots of other thing that pose greater threats like global warming and oceans rising.
In general, yes it is true that Enzyme molecules react with reactants to produce substrates, but it should be noted that this is not always necessarily the case.
B offspring receive one set of chromosomes from each parent
The optical microscope, also referred to as a light microscope, is a type of microscope that commonly uses visible light and a system of lenses to generate magnified images of small objects