Miscellaneous Archives

241. Consider the following pairs : Country Animal found in its n

Consider the following pairs :

	Country	Animal found in its natural habitat
1.	Brazil	Indri
2.	Indonesia	Elk
3.	Madagascar	Bonobo

How many of the pairs given above are correctly matched ?

[amp_mcq option1=”Only one” option2=”Only two” option3=”All three” option4=”None” correct=”option4″]

This question was previously asked in

UPSC IAS – 2024

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Let’s evaluate each pair:
1. Brazil, Indri: The Indri (Indri indri) is the largest living lemur and is found only in Madagascar, not Brazil. Incorrect match.
2. Indonesia, Elk: The term “Elk” usually refers to *Cervus canadensis*, native to North America and East Asia. While some deer species in Indonesia might be colloquially referred to with “elk” in their name (like the Sambar deer or ‘Indian Elk’), the standard “Elk” is not naturally found in Indonesia. Incorrect match.
3. Madagascar, Bonobo: Bonobos (Pan paniscus) are found only in the Congo Basin in Central Africa (Democratic Republic of Congo), not in Madagascar. Incorrect match.
None of the given pairs are correctly matched regarding the natural habitat of the animals.

– Indri are native to Madagascar.
– Bonobos are native to the Democratic Republic of Congo.
– Elk (*Cervus canadensis*) are native to North America and East Asia.

Zoogeography, the study of the geographical distribution of animal species, reveals that different regions of the world have distinct faunas due to evolutionary history, climate, and geographical barriers. Madagascar is famous for its unique biodiversity, including many endemic species of lemurs.

242. Consider the following : 1. Carabid beetles 2. Centipedes 3. Flies

Consider the following :

1. Carabid beetles
2. Centipedes
3. Flies
4. Termites
5. Wasps

Parasitoid species are found in how many of the above kind of organisms ?

[amp_mcq option1=”Only two” option2=”Only three” option3=”Only four” option4=”All five” correct=”option1″]

This question was previously asked in

UPSC IAS – 2024

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Parasitoid species are found among flies (Order Diptera) and wasps (Order Hymenoptera). Many families within these orders contain species that are parasitoids, with their larvae developing inside or on a host organism, eventually leading to the host’s death. Carabid beetles and Centipedes are typically predatory, while Termites are social insects primarily feeding on wood or other plant material. Therefore, parasitoid species are found in only two of the listed kinds of organisms: Flies and Wasps.

A parasitoid is an organism that lives in close association with a host, where the parasitoid obtains nutrients from the host, eventually resulting in the death of the host. This is distinct from a parasite, which typically does not kill its host.

Examples of parasitoid flies include Tachinid flies, which parasitize other insects. Many families of wasps, such as Ichneumonidae and Braconidae, are well-known for their parasitoid lifestyles, attacking caterpillars, beetles, aphids, and other insects.

243. In which of the following are hydrogels used ? Select the correct answ

In which of the following are hydrogels used ?
Select the correct answer using the code given below :

Controlled drug delivery in patients
Mobile air-conditioning systems
Preparation of industrial lubricants

[amp_mcq option1=”1 only” option2=”1 and 2 only” option3=”2 and 3 only” option4=”1, 2 and 3″ correct=”option4″]

This question was previously asked in

UPSC IAS – 2024

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The question asks in which of the listed activities hydrogels are used. Hydrogels are three-dimensional networks of hydrophilic polymers that can absorb large amounts of water or biological fluids. Their unique properties make them useful in various applications.
1. Controlled drug delivery in patients: Hydrogels are extensively used in drug delivery systems. Drugs can be incorporated into the hydrogel matrix and released in a controlled manner as the hydrogel swells or degrades, allowing for sustained or targeted drug release. This is a well-established application.
2. Mobile air-conditioning systems: Hydrogels can be used in certain types of cooling systems, particularly those involving moisture absorption and evaporation. For instance, they can be incorporated into evaporative cooling pads or desiccant systems for moisture removal, which is a component in some air conditioning or cooling technologies, including potentially mobile or portable systems exploring energy efficiency or alternative cooling methods. While not in traditional compressor-based ACs, they are used in specific advanced or niche cooling applications.
3. Preparation of industrial lubricants: Certain hydrogels exhibit excellent lubricating properties, especially in aqueous environments. They can reduce friction between surfaces and are explored or used as lubricants in various industrial applications, particularly in machinery and biomedical devices where traditional oil-based lubricants are unsuitable. This is an established application.
Based on the known uses of hydrogels, all three activities are valid applications.

Hydrogels are versatile materials due to their biocompatibility, flexibility, and high water content, making them suitable for applications ranging from biomedical engineering and agriculture to environmental science and industrial processes.

Besides the listed applications, hydrogels are also used in areas such as tissue engineering (as scaffolds for cell growth), wound dressings (to maintain a moist environment), contact lenses, diapers and sanitary napkins (as superabsorbents), agriculture (for water retention in soil), and sensing (as responsive materials). The ability of hydrogels to respond to various stimuli (like temperature, pH, light) further expands their utility in smart systems like responsive drug delivery or sensors.

244. Consider the following statements : 1. According to the Constitution

Consider the following statements :

1. According to the Constitution of India, the Central Government has a duty to protect States from internal disturbances.

2. The Constitution of India exempts the States from providing legal counsel to a person being held for preventive detention.

3. According the Prevention of Terrorism Act, 2002, confession of the accused before the police cannot be used as evidence.

How many of the above statement are correct?

[amp_mcq option1=”Only one” option2=”Only two” option3=”All three” option4=”None” correct=”option2″]

This question was previously asked in

UPSC IAS – 2023

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The correct option is B.

Statement 1 is correct. Article 355 of the Constitution of India states that it is the duty of the Union to protect every State against external aggression and internal disturbance and to ensure that the government of every State is carried on in accordance with the provisions of this Constitution.
Statement 2 is correct. Article 22(1) guarantees the right to consult and be defended by a legal practitioner of one’s choice. However, Article 22(3)(b) states that this right does not apply to a person arrested or detained under any law providing for preventive detention. Thus, the Constitution itself exempts the State from the obligation under Article 22(1) to provide legal counsel in cases of preventive detention. While other provisions or laws (like free legal aid under Article 39A) might apply, the constitutional right under Article 22(1) is specifically not available.
Statement 3 is incorrect. The Prevention of Terrorism Act (POTA), 2002, contained a controversial provision (Section 32) which allowed confessions made by an accused person before a police officer of the rank of Superintendent of Police or higher to be admissible in evidence, unlike the general rule under the Indian Evidence Act, 1872 which makes confessions before police officers inadmissible. POTA was repealed in 2004.

Preventive detention laws are an exception to the general rule regarding personal liberty and due process. Article 22(4)-(7) provides safeguards against arbitrary preventive detention, such as the requirement for review by an advisory board.

245. Consider the following trees: 1. Jackfruit (Artocarpus heterophyllus)

Consider the following trees:
1. Jackfruit (Artocarpus heterophyllus)
2. Mahua (Madhuca indica)
3. Teak (Tectona grandis)
How many of the above are deciduous trees?

[amp_mcq option1=”Only one” option2=”Only two” option3=”All three” option4=”None” correct=”option2″]

This question was previously asked in

UPSC IAS – 2023

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1. Jackfruit (Artocarpus heterophyllus) is generally considered an evergreen tree, although it might shed some leaves in certain conditions, it does not exhibit complete seasonal leaf shedding typical of deciduous trees.
2. Mahua (Madhuca indica) is typically described as a deciduous or semi-deciduous tree, shedding most or all of its leaves during the dry season (usually February-March in central India).
3. Teak (Tectona grandis) is a well-known large deciduous tree, shedding its leaves annually during the dry season.
Therefore, Mahua and Teak are deciduous trees among the options.

– Deciduous trees shed leaves seasonally.
– Jackfruit is evergreen.
– Mahua and Teak are deciduous trees commonly found in India.

Mahua is economically important for its flowers and seeds. Teak wood is highly valued for its durability and is widely used in furniture and construction. Jackfruit is the national fruit of Bangladesh and Sri Lanka, and a state fruit of Kerala and Tamil Nadu in India.

246. Consider the following statements: 1. Some microorganisms can grow i

Consider the following statements:

1. Some microorganisms can grow in environments with temperature above the boiling point of water.
2. Some microorganisms can grow in environments with temperature below the freezing point of water.
3. Some microorganisms can grow in highly acidic environment with a pH below 3.

How many of the above statements are correct?

[amp_mcq option1=”Only one” option2=”Only two” option3=”All three” option4=”None” correct=”option3″]

This question was previously asked in

UPSC IAS – 2023

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All three statements are correct.

1. **Some microorganisms can grow in environments with temperature above the boiling point of water:** This is correct. Thermophiles and hyperthermophiles are types of extremophilic microorganisms (often Archaea and Bacteria) that thrive at very high temperatures, such as those found in hydrothermal vents or hot springs, where temperatures can exceed 100°C and even reach above 120°C under pressure.
2. **Some microorganisms can grow in environments with temperature below the freezing point of water:** This is correct. Psychrophiles are extremophilic microorganisms that are capable of growth and reproduction in cold temperatures, typically between -15°C and 10°C. They are found in environments like polar ice, glaciers, permafrost, and the deep sea.
3. **Some microorganisms can grow in highly acidic environment with a pH below 3:** This is correct. Acidophiles are extremophilic microorganisms that thrive in highly acidic environments, with optimum pH levels typically between 0 and 3. Examples include species found in acid mine drainage or volcanic sulfur springs.

The ability of microorganisms to survive and proliferate in a vast range of extreme environmental conditions (extremophiles) highlights their remarkable metabolic and physiological diversity, adapted through evolutionary processes.

247. Consider the following statements regarding the Indian squirrels: 1.

Consider the following statements regarding the Indian squirrels:

1. They build nests by making burrows in the ground.
2. They store their food materials like nuts and seeds in the ground.
3. They are omnivorous.

How many of the above statements are correct?

[amp_mcq option1=”Only one” option2=”Only two” option3=”All three” option4=”None” correct=”option2″]

This question was previously asked in

UPSC IAS – 2023

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Only two of the above statements are correct.

1. **They build nests by making burrows in the ground:** This is generally incorrect for the common Indian squirrels (like the Indian Palm Squirrel). Tree squirrels, which are prevalent in India, typically build nests called ‘dreys’ high up in trees using twigs, leaves, and other plant materials. While some squirrel species (ground squirrels) do burrow, this is not characteristic of the squirrels commonly referred to in India in this context.
2. **They store their food materials like nuts and seeds in the ground:** This is correct. Burying or ‘caching’ nuts and seeds is a common behaviour among many squirrel species, including Indian squirrels, to store food for later consumption, particularly during scarcity.
3. **They are omnivorous:** This is correct. While their diet primarily consists of plant material like nuts, seeds, fruits, and buds, Indian squirrels are known to also eat insects, larvae, bird eggs, and occasionally small vertebrates, making them omnivorous.

The most common squirrel species in India are tree squirrels like the Indian Palm Squirrel (*Funambulus palmarum*) and the Indian Giant Squirrel (*Ratufa indica*). Their habits align with statements 2 and 3, but not statement 1.

248. Consider the following statements: 1. Some mushrooms have medicinal

Consider the following statements:

1. Some mushrooms have medicinal properties.
2. Some mushrooms have psycho-active properties.
3. Some mushrooms have insecticidal properties.
4. Some mushrooms have bioluminescent properties.

How many of the above statements are correct?

[amp_mcq option1=”Only one” option2=”Only two” option3=”Only three” option4=”All four” correct=”option4″]

This question was previously asked in

UPSC IAS – 2023

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All four statements are correct.

1. **Some mushrooms have medicinal properties:** Many mushroom species have been traditionally used for medicinal purposes and are being researched for compounds with potential benefits, including anti-cancer, immune-modulating, and antibiotic effects (e.g., Reishi, Shiitake, Turkey Tail).
2. **Some mushrooms have psycho-active properties:** Certain mushrooms contain psychoactive compounds like psilocybin and psilocin (e.g., Psilocybe species), which affect the mind and perception.
3. **Some mushrooms have insecticidal properties:** Some fungi, including certain mushroom species, produce compounds that are toxic or deterrent to insects. *Amanita muscaria*, for example, contains ibotenic acid, which has insecticidal properties.
4. **Some mushrooms have bioluminescent properties:** Several species of fungi, including certain mushrooms (e.g., some *Mycena* species, *Panellus stipticus*), are bioluminescent, meaning they produce light through a chemical reaction.

Fungi are a diverse kingdom, and mushrooms, being the fruiting bodies of many fungi, exhibit a wide range of biological and chemical properties, including those mentioned in the statements.

249. Which of the following organisms perform waggle dance for others of th

Which of the following organisms perform waggle dance for others of their kin to indicate the direction and the distance to a source of their food?

[amp_mcq option1=”Butterflies” option2=”Dragonflies” option3=”Honeybees” option4=”Wasps” correct=”option3″]

This question was previously asked in

UPSC IAS – 2023

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Honeybees perform the waggle dance to indicate the direction and distance to a source of food.

The waggle dance is a specific figure-eight dance performed by honeybees (Apis mellifera) to communicate the location of food sources, water sources, or new nest sites to other members of the colony. The direction and duration of the “waggle” run within the dance correlate directly to the direction and distance of the resource from the hive relative to the sun’s position.

This remarkable form of communication was extensively studied by Nobel laureate Karl von Frisch. While other insects like ants also use chemical trails and other signals, the waggle dance is uniquely associated with honeybees for complex spatial information transfer.

250. Consider the following fauna: 1. Lion-tailed Macaque 2. Malabar C

Consider the following fauna:

1. Lion-tailed Macaque
2. Malabar Civet
3. Sambar Deer

How many of the above are generally nocturnal or most active after sunset?

[amp_mcq option1=”Only one” option2=”Only two” option3=”All three” option4=”None” correct=”option2″]

This question was previously asked in

UPSC IAS – 2023

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Only two of the listed fauna are generally nocturnal or most active after sunset.

1. **Lion-tailed Macaque:** These are diurnal animals, meaning they are primarily active during the day.
2. **Malabar Civet:** This species is known to be strictly nocturnal, active mainly during the night.
3. **Sambar Deer:** While they can be active during the day, Sambar deer are often crepuscular (most active during dawn and dusk) and their activity often extends into the night, especially in areas with human disturbance. Thus, they are frequently most active after sunset.

Therefore, the Malabar Civet is nocturnal, and the Sambar Deer is often crepuscular/nocturnal, fitting the description “generally nocturnal or most active after sunset”. The Lion-tailed Macaque is diurnal. This makes a total of two species out of the three listed.