People, Development & Environment MCQ Questions for UGC-NET

Loam soil is ideal for earthworm activity because it has a good balance of sand, silt, and clay, providing optimal moisture and organic matter. Although waterlogged, gleyed soil can still support earthworms in certain conditions due to the presence of organic material. Rendzina soil type is rich in calcium carbonate and organic matter, making it favorable for earthworm activity.

Podzol soils are acidic, nutrient-poor, and low in organic matter, making them unsuitable for earthworm activity.Thus, the correct answer is A, B, and C Only.

Background noise level — Correct:
\(L_{90}\) is the noise level exceeded for 90% of the measurement period. It represents the relatively constant background or ambient noise.

Average noise level — Incorrect:
Average noise exposure is generally represented by the equivalent continuous sound level, \(L_{eq}\), rather than \(L_{90}\).

Peak noise level — Incorrect:
Peak or intrusive noise is commonly indicated by \(L_{10}\), which is the sound level exceeded for 10% of the measurement period.

Threshold noise level — Incorrect:
A threshold noise level is a specified limit or minimum audible level. It is not represented by \(L_{90}\).

Keoladeo National Park — Correct:
Keoladeo National Park, formerly known as Bharatpur Bird Sanctuary, is located in Rajasthan. It contains an artificial, human-managed wetland created through the construction of embankments and sluice gates. It is an important habitat for resident and migratory birds.

Rajaji National Park — Incorrect:
Rajaji National Park is located in Uttarakhand. It is primarily characterised by forests, riverine vegetation and the Shivalik landscape and is particularly known for its Asian elephant population.

Kanha National Park — Incorrect:
Kanha National Park is located in Madhya Pradesh. It mainly consists of sal forests, grasslands and forested plateaus and is well known for tigers and barasingha.

Manas National Park — Incorrect:
Manas National Park is located in Assam at the Himalayan foothills. It contains grasslands, forests and riverine ecosystems but is not identified as the artificial wetland referred to in the question.

Gross Primary Productivity — Incorrect:
Gross Primary Productivity is the total rate at which producers, such as green plants, capture energy and produce organic matter through photosynthesis.

Gross Secondary Productivity — Incorrect:
Gross Secondary Productivity is the total food energy assimilated by consumers after subtracting the energy lost through faeces from the energy consumed.

Net Primary Productivity — Incorrect:
Net Primary Productivity is the biomass accumulated by plants after subtracting their respiratory losses from gross primary productivity:

$$ NPP = GPP - R $$
Net Secondary Productivity — Correct:
Net Secondary Productivity is the energy or biomass accumulated by an animal after accounting for respiratory and metabolic losses. It represents the animal’s actual gain in biomass.
Net secondary productivity=Assimilated energy−Respiratory losses