1-Which bacteria seem to be most frequently used in the production of food? Propose an explanation for this

2-Why might the influenza vaccine be less effective than other vaccines?

3-Which diseases of the gastrointestinal tract can be acquired by swimming in a pool or lake? Why are these diseases not likely to be acquired while swimming in the ocean?

4-How is cholera transmitted? How does an earthquake promote transmission?

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

what in the weirdo : o

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.