Can someone please help?

One of the largest seafood exporters to the united states is a. china b. brazil c. mexico d. saudi arabia

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.

What will happen if two of the base pairs of the stand of the dna are switched