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Swagatam Ghosh Dastidar

· started a discussion

· 1 Months ago

Incorrect Answer (Question:968263.0)

B should be answer. While Jellyfish do eat plankton, no where is it written that they survive longer because of it.

Question:

DIRECTIONS: Read the following passage carefully and answer the questions given below it. 


When Hurricane Harvey loomed off the coast of my home state of Texas, it seemed to fill the entire Gulf of Mexico. Thermodynamic laws require that warmer air holds more water vapor. The heat armed the storm with a mighty arsenal of water vapor. Then Harvey returned to land, dumping a catastrophic amount of rain on Houston. 

 

                My Facebook feed filled with pleas for rescue from the rising waters. Friends’ houses flooded - houses that had always been on dry land before. A chemical plant blew up, twice. Toxic chemicals oozed from Superfund sites. Dozens died in the deluge, mostly by drowning. And all the while, alongside the heartbreak and horror, I kept thinking about a strange harbinger: jellyfish. Play Video Diaphanous in form yet menacing in sting, jellyfish have a powerful capacity to capture our imagination. They undulate in a primal rhythm, blinking open and closed like eyes that can peer into the soul of the sea. And what they are seeing are changes produced by us here on land. Because we burn fossil fuels, which release greenhouse gasses, not only the atmosphere but ocean waters are also severely affected. 

                 Rampant coastal development provides new habitat for a jellyfish stage called a polyp that looks like a sea anemone. When it finds a hard surface like a dock or a jetty to grow on, a single polyp can proliferate into a dozen or even more medusae. And fields of polyps grow on those hard structures. That’s likely what happened off the coast of Italy, where gas platforms are thought to be the home for a new invasion of jellyfish. In the twentieth century in the Adriatic Sea, moon jellies, pinkish with their characteristic four-leafed clover on top, were a rarity. Now they are ubiquitous. And as we wash pollution into our waters, we create low-oxygen environments. Some jellyfish, with their low metabolic rate due to their a-cellular jelly insides, can survive more easily there than fish, with their oxygen-guzzling muscled tissues. That is part of what happened in the Yellow Sea, where pollution is unchecked.

                It is the birthplace of a maroon jellyfish that reaches a weight of 500 pounds. Blooms of the creature were a once-a-generation event before 2000 — the kind of thing fishermen mentioned to their sons. But jellyzillas swept from China in the Tsushima Current, have plagued Japan’s coast almost every year of the 21st century. In 2009, a fishing boat caught so many that their weight capsized the vessel. (Fortunately, the crew members were rescued.) And our lack of oversight of the fishing industry, which has removed more than 90% of the large fish from the seas, has depleted the predators of jellyfish as well as their competitors. Jellyfish are eaten by some fish, and jellyfish eat the same small zooplankton that fish do. The ecological vacuum left by unrestrained fishing can allow jellyfish to expand their influence in marine ecosystems. That’s what happened off the coast of Namibia.

How is jellyfish able to survive in polluted water more than the other fishes?

(I) Jellyfish has oxygen guzzling muscled tissues.

(II) Due to low metabolic rate.

(III) Jellyfish eat small zooplankton to survive.

Options:
A)

Only (I)

B)

Only (II)

C)

Both (I) and (II)

D)

Both (II) and (III)

E)

All are correct

Solution:

Answer: Option (c)

Both the statements (I) and (II) are the reasons through which Jellyfish can survive more than the other fishes in polluted water as stated towards the end of the 3rd paragraph.

Knowledge Expert

· commented

· 1 Months ago

Dear student,
The given answer is correct. point (I) is also mention at second last line and point (II) is in third last line. so the I & II both are correct.

Regards
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