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anzhelika [568]
3 years ago
5

Which of the following statements is true about aquaculture? An aquaculturist can throw some young shrimp in a pond and they wil

l take care of themselves. It means “cultivating small acreages of land.” An aquaculturist must tend to the tanks carefully to make sure predators do not eat the shrimp. The tanks are large aquariums built in warehouses.
Arts
1 answer:
irinina [24]3 years ago
5 0

Answer:

B. Aquaculture means "cultivating small acreages of land."

Explanation:

Aquaculture is the growing of fishes, crustaceans, molluscs, oysters and other marine organisms like algae in a small acreage of farm. Normally, the carryign capacity per acreage would be lower in the natural habitat – like in the oceans- but this is raised substantially in aquaculture due to adopting certain farming techniques. An example is by cycling the wastewater from teh fish tanks to plants that take up the waste as nutrients and oxygenate the water, The water is then recycled back to the tanks as cleaner water reusable by the fishes and teh cycle continues. This cycle ensures the sustainability of the farm even with very little water compared to the natural environment.  

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“Maybe you can get a dollar. On a good day.” My heart sank. The really valuable coins, he explained, typically ...

<h2>EXPLANATION</h2>

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I arrived at Martin’s Coins & Jewelry in South Burlington with a Ziploc bag full of old coins and fantasies of an early retirement. After my grandfather died, I inherited the foreign currency he’d accumulated over decades of travel: bills and coins from Israel, Morocco, Portugal and Venezuela, to name but a few. Surely somewhere amid all these lirot, francs, centimos and bolivares was something of real value.

John K. Martin Jr. was my go-to expert. A professional numismatist and coin dealer, Martin has 20 years of experience getting Vermonters top dollar for their rare and precious coins. Lately, about half his business has been buying and selling scrap gold and silver, jewelry, diamonds, and watches. The reason: The recession has cut into the number of coin collectors willing to shell out new green for old silver.

Martin’s shop, sandwiched between the Book Worm’s Exchange and Jiffy Lube on Shelburne Road, is small and unpretentious, with display cases full of Silver Certificates, Indian Heads and other minted oddities. I saw a 1955 “double die” penny, with dual images of Lincoln on its face. A 25-cent gold piece from 1872, valued at $2500, was about the size of my pinky nail. Another double die, an Indian Head from 1873, was listed at $5000. My palms started getting itchy.

Martin, 48, had agreed to review my collection. Naturally, I assumed the oldest coins were worth the most: French francs minted during the Vichy years, a pre-Franco Spanish peseta and a Haitian coin from 1908 all looked promising to my untrained eye.

Martin quickly burst my bubble. It really boils down to supply and demand, he explained. Coins may be very scarce, but if no one collects them, they have little or no value. He looked up one of my coins on the “gray sheet,” the weekly bible for serious collectors. Minted in 1937, it was from Norway and 80 percent silver. After tapping away on his calculator, he announced its market value: $3.30.

The news was even worse on the 1908 Haitian coin. “It starts in the catalog at a buck and a quarter,” Martin declared. “Maybe you can get a dollar. On a good day.” My heart sank.

The really valuable coins, he explained, typically contain gold or silver, like the South African Krugerrands and the Canadian Maple Leafs. They’re actively traded, “like the stock market,” and valuations can fluctuate $50 in one day.

Then there are the collectibles. Minting mishaps, such as the double dies and offset faces, can net you serious bucks, Martin noted, as can “waffled” coins, which somehow made it into circulation after the mint ran them through a press to destroy them. The “grade,” or condition, of the coin makes a difference, as does its “relief,” or detail. Either can swing a coin’s value from $26 to $20,000.

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