Environment, Ecology & Biodiversity MCQs
Environment, Ecology & Biodiversity Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations.
41. Which of the following fish species was found as an invasive species causing decline of other species in the River Krishna?
[A] Feral Fish
[B] Silver carp
[C] Tilapia
[D] Gouramy
Show Answer
Correct Answer: A [ Feral Fish ]
Notes:
Feral Fish is a fish species which has been reported to cause enormous damage to fish population in Krishna River.
42. Consider the following:
1. Pisces
2. Prawns
3. Silkworm
4. Shell fishery
Which among the following is/ are included in aquaculture?
[A] Only 1 & 2
[B] Only 1, 2 & 4
[C] Only 1, 3 & 4
[D] 1, 2, 3 & 4
Show Answer
Correct Answer: B [ Only 1, 2 & 4]
Notes:
Silkworm is not an aquatic organism. Silkworm comes under sericulture.
43. Consider the following animals:
- Snow leapord
- Sloth bear
- Himalayan palm civet
- Blue whale
- Wild musk deer
- Hoolock gibbon
Which of the above are mammals?
[A] 1,2 and 4 Only
[B] 3, 5 and 6 Only
[C] 1,4,5 and 6 Only
[D] 1, 2, 3, 4, 5 and 6
Show Answer
Correct Answer: D [ 1, 2, 3, 4, 5 and 6]
Notes:- Different species under Horses, ass, bear, antelopes, cat, tigers, monkeys, apes, whale, goat, buffalo are generally classified as mammals.
- Crocodiles, turtles and snakes under Reptiles.
- Frogs are classified generally under amphibians.
- Birds such as quail, duck, vulture, owlet and cranes etc under aves.
44. With reference to ecological succession, which among the following community is also known as a ‘pioneer community’ due to its ability to colonize bare rock?
[A] Fungi
[B] Blue Green algae
[C] Lichens
[D] Mosses & Liverworts
Show Answer
Correct Answer: C [ Lichens]
Notes:
A pioneer community is a collection of organisms able to colonize bare rock. Lichens help break down rock and accumulate debris, helping to form a thin soil layer. The soil layer begins to support small forms of life.
45. Identify the national park with the help of given information:
- The park is often referred to as the "abode of perpetual winds" as well as the "land of spirits
- It is home to barking deer and the golden cat
- It is listed as one of the Elephant corridors in India
Select the correct answer from options given below:
[A] Balpakram National Park
[B] Gugamal National Park
[C] Hemis National Park
[D] Kalesar National Park
Show Answer
Correct Answer: A [ Balpakram National Park ]
Notes:
All above statements are features of Balpakram National Park
46. Consider the following cycles:
- Nitrogen
- Water
- Carbon cycle
Which of the above is/are sedimentary cycle(s)?
[A] 2 Only
[B] 1 & 3 Only
[C] 1, 2 & 3
[D] None
Show Answer
Correct Answer: D [ None]
Notes:
All of the above are gaseous cycles. Sedimentary cycles include those of iron, calcium, phosphorus etc.
47. In which of the following cases, the ecological pyramid is never inverted?
[A] Pyramid of energy
[B] Pyramid of biomass
[C] Pyramid of numbers
[D] Pyramid of species richness
Show Answer
Correct Answer: A [ Pyramid of energy ]
Notes:
Pyramid of energy is never inverted.
48. Consider the following:
- Neuston
- Plankton
- Nekton
Which of the above is/are found in lotic ecosystem?
[A] 1 Only
[B] 1 & 3 Only
[C] 2 Only
[D] 1, 2 & 3
Show Answer
Correct Answer: B [ 1 & 3 Only]
Notes:
Plankton are found only in lentic ecosystem. In most lotic systems, phytoplankton are simply displaced by the current, and are not able to form standing populations.
49. Which among the following is / are warm blooded animals?
- Mammals
- Birds
- Fishes
- Reptiles
Select the correct option from the codes given below:
[A] 1 Only
[B] 1 & 2 Only
[C] 1, 2 & 3 Only
[D] 1, 2, 3 & 4
Show Answer
Correct Answer: B [ 1 & 2 Only]
Notes:
With a few exceptions, all mammals and birds are warm-blooded, and all reptiles, insects, arachnids, amphibians and fish are cold-blooded.
50. Dumping of Iron to the upper ocean can significantly induce the Carbon sequestration in Oceans. This is because introduction of iron to the upper ocean__:
[A] will increase CO2 solubility in Ocean water
[B] will stimulate phytoplankton bloom
[C] will suppress the growth of phytoplankton
[D] will stimulate the growth of fishes and zooplankton
Show Answer
Correct Answer: B [ will stimulate phytoplankton bloom]
Notes:
This question is based upon the concept of Iron fertilization, whereby introduction of iron to the upper ocean to stimulate a phytoplankton bloom is adopted. Like all plants, phytoplankton takes up C02 from air and converts it to carbon compounds like carbohydrates. The plant quickly dies and starts sinking, taking the carbon with it. What happens thereafter is the key to the technique’s efficacy: If it sinks well below the ocean surface, the carbon would effectively have been put away for a long period (Carbon sequestration). This has led to several experiments in recent times.
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