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question 4 although people have been farming fish for many years, scientific fish farming is a fairly recent development.
separates items in a series separates coordinate adjectives (adjectives that independently modify the same noun)
joins two main clauses
sets off an introductory clause, phrase, or word
sets off a nonrestrictive modifier (modifying words that could be removed without loss of meaning) 1.5 points

question 5 aquaculture is less extensive in the united states, but it is becoming more common every year. separates items in a series separates coordinate adjectives (adjectives that independently modify the same noun) joins two main clauses sets off an introductory clause, phrase, or word sets off a nonrestrictive modifier (modifying words that could be removed without loss of meaning) 1.5 points

question 6 aquaculture, the technical name for fish farming, also occurs in many other asian countries. separates items in a series separates coordinate adjectives (adjectives that independently modify the same noun) joins two main clauses sets off an introductory clause, phrase, or word sets off a nonrestrictive modifier (modifying words that could be removed without loss of meaning) 1.5 points

question 7 aqueducts, which are manmade systems to transport water, have been around since ancient times. aqueducts which are manmade systems to transport water, have been around since ancient times. aqueducts, which are manmade systems to transport water have been around since ancient times. no change 1.5 points

question 8 fish can also be raised in cages and raceways, which to protect the newly born until they are old enough to be released. separates items in a series separates coordinate adjectives (adjectives that independently modify the same noun) joins two main clauses sets off an introductory clause, phrase, or word sets off a nonrestrictive modifier (modifying words that could be removed without loss of meaning) 1.5 points

question 9 fish can be farmed in swamps, lakes, coastal areas, and ponds. separates items in a series
separates coordinate adjectives (adjectives that independently modify the same noun)
joins two main clauses
sets off an introductory clause, phrase, or word
sets off a nonrestrictive modifier (modifying words that could be removed without loss of meaning) 1.5 points

question 10 in china, nearly half the fish supply comes from fish farms. separates items in a series
separates coordinate adjectives (adjectives that independently modify the same noun)
joins two main clauses
sets off an introductory clause, phrase, or word
sets off a nonrestrictive modifier (modifying words that could be removed without loss of meaning)