Question 91 In a recent study of fish stocks, it was determined that if we do no

Question

Question 91

In a recent study of fish stocks, it was determined that if we do not change our commercial fishing practices, all marine stocks of fish will crash by the year:

2090

2048

2025

2100

2079

Question 93

Of the following desalination plants, which produces the most potable drinking water per day?

Sorek (Israel)

Jamnagar (India)

Carsbad (USA)

Magtaa (Algeria)

Handy (China)

Question 99

When a coyote eats a mouse, roughly___ % of the mouse gets incorporated by the coyote, and the rest is given off as heat.

50

10

90

25

5

Question 100

Competition for mates will increase within a population as the density of the population increases.

True

False

Question 101

Part of Darwin's theory of natural selection says that in a given population, many more individuals are produced each generation than the environment can support.

True

False

Question 102

The plastics found in water bottles come from petroleum products.

True

2090

2048

2025

2100

2079

Explanation / Answer

Q91. Commercial over exploitation of the world's fish stock is severe. There will be total collapse of all fish that are currently caught commercially by 2048.

Q93. Sorek desalination plant of Israel produces 624000 cubic meters of potable drinking water per day. Which is highest among them. It is the world's largest sea water reverse - osmosis plant.

Q99. As per the 10 percent law of thermodynamics only 10 percent of the total energy is incorporated into the next trophic level and 90 percent is lost as heat. So only 10 percent of mouse gets incorporated by the coyote.

Q100. As the density increases number of mating competitors also increases. There is also the increase in risk of predation. So it is true that competition for mates increases with the increase in density of the population.

Q101. It is true. As per darwins theory of natural selection more individuals are produced in each generation than the environment can support. Those individuals which get useful traits from their parents will have more chance of survival. This is called survival of the fittest.

Q102. Plastic found in water bottles is mostly polyethylene which is a petroleum product. Plastic is made by distillation process in oil refineries.

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