UPSC 2018 Environment and Ecology Questions with Answers
12 previous year UPSC Prelims questions on Environment and Ecology in the UPSC 2018 Prelims. Choose an option to see the answer and explanation.
Explanations state facts as of the year each question was asked; words like “recently” refer to that year.
Showing 11–12 of 12 questions
Browse Environment and Ecology chapters
UPSC 2018Environment and Ecology · Protected Areas for the Biodiversity Conservation
Q11. In which one of the following States is Pakhui Wildlife Sanctuary located?
Explanation
Pakke Tiger Reserve is also known as "Pakhui Tiger Re-serve". It is situated in the East Kameng district of Arunachal Pradesh, India. It is one of the key protected areas in the Eastern Himalayas and is renowned for its rich biodiversity. The reserve lies within the Eastern Himalayan biodiversity hotspot, an area known for its diverse flora and fauna. Pakhui is home to a significant population of Royal Bengal tigers, along with Asian elephants, clouded leopards, Hoolock gibbons, and a variety of bird species, including the endangered Great Indian hornbill. For its Hornbill Nest Adoption Program, this Tiger Reserve received the 2016 India Biodiversity Award in the category of "Conservation of vulnerable species."
UPSC 2018Environment and Ecology · Species
Q12. Why is a plant called Prosopis juliflora often mentioned in the news?
Explanation
Prosopis juliflora, or mesquite, is a leguminous flowering plant native to South America. It has become invasive in regions like India, Africa, and the Middle East, where it competes with native species for water and nutrients, threatening local bio-diversity.
Answer key for these questions
Q
UPSC year
Correct answer
11
2018
(a) Arunachal Pradesh
12
2018
(b) It tends to reduce the biodiversity in the area in which it grows.
Frequently asked questions
How many previous year UPSC questions are there on Environment and Ecology?
This page covers 12 previous year UPSC Prelims GS Paper-I questions on Environment and Ecology in the UPSC 2018 Prelims, asked from 1996 to 2025. Each has the correct answer and an explanation.
How should I use previous year UPSC questions for Prelims?
Attempt each question first, then open the answer and read the explanation for every option. Repeat by chapter, and track which statements UPSC reuses across years. Previous year questions show the exam pattern and difficulty level.
Which years are covered for Environment and Ecology?
Questions on Environment and Ecology in the UPSC 2018 Prelims are available for 22 years, from 1996 to 2025. Use the Year filter to practise a single paper.
