20000+ Important MCQs for AIR FORCE

Explanation:

Alluvial soils are fertile and rich in minerals but are often poor in nitrogen and humus (organic matter), which are essential for soil fertility.

• Farmers often add fertilizers to improve nitrogen content.

So, alluvial soils are poor in nitrogen and humus — option (C).

Explanation:

The Great Barrier Reef is the largest coral reef system in the world, stretching over 2,300 kilometers along the northeast coast of Australia, specifically in the Coral Sea off Queensland. It is composed of over 2,900 individual reefs and 900 islands made of coral.

Why Australia?

• The reef lies off the coast of Queensland in northeastern Australia.
• It’s recognized as a UNESCO World Heritage site because of its immense biodiversity and ecological significance.
• The reef is famous for its clear blue waters, diverse marine life including hundreds of species of coral, fish, and other sea creatures.

Why not the others?

• (A) Indonesia has many coral reefs but does not have the Great Barrier Reef. It’s known for the Coral Triangle region with rich marine biodiversity.
• (B) Philippines also has many coral reefs but much smaller in scale compared to the Great Barrier Reef.
• (D) Caribbean Islands have coral reefs but again, they are smaller and located in the Caribbean Sea, far from Australia.

So, the Great Barrier Reef is uniquely and famously located in Australia.

Explanation: Each letter forwarded by 1 step to get the letter in next word.

Explanation: B+1=C, C+2=E, E+3=H, H+4=L, L+5=Q, Q+6=W

Explanation: XYZ, CBA, UVW, FED, RST