1831. Endemic species are

A. rare species
B. species localised in a specific region
C. cosmopolitan in distribution
D. critically endangered species
✅ The correct answer is option B.
Endemic species are plants and animals that exist only in one geographic region. Species can be endemic to large or small areas of the earth: some are endemic to a particular continent, some to part of a continent, and others to a single island.

1833. World’s first Teak Forest was planted in 1842 in Kerala. Identify the place.

A. Wayanad
B. Nilambur
C. Silent Valley
D. Nelliyampathy
✅ The correct answer is option B.
The first teak plantations were raised in Nilambur in 1842 by the British. H V Conolly, the Malabar District Collector during the British rule, was instrumental in planting teak in the entire Nilambur area, with the help of Chathu Menon, a forest officer. Now the plantation is named after Conolly.

1834. Rain water harvesting is a major method implemented for_____________

A. Water Conservation
B. Soil Conservation
C. Forest conservation
D. Ecological conservation
✅ The correct answer is option A.
Rainwater harvesting has been a popular method of obtaining water for agriculture and for drinking purposes in rural homes. The legislation to promote rainwater harvesting was enacted through the Urban Development Authority (Amendment) Act, No. 36 of 2007.

1836. Molten rock deep inside the earth is called

A. core
B. valcano
C. lava
D. magma
✅ The correct answer is option D.
Below the crust lies a layer of very hot, almost solid rock called the mantle. Beneath the mantle lies the core. … Sometimes, hot molten rock, called magma, bursts through Earth’s surface in the form of a volcano.

1838. The heat energy released when water vapour changes to a liquid is called:

A. Latent heat of evaporation
B. Latent heat of fusion
C. Latent heat of fission
D. Latent heat of condensation
✅ The correct answer is option D.
Latent heat of condensation, also called the heat of vaporization, is the amount of energy necessary to change a liquid to a vapour at constant temperature and pressure.