Minimalist IAS
Environment & ecology

Prelims · Environment & ecology · 67 questions

Biodiversity, plants & animals

Every UPSC Prelims question on this topic, 2016–2026, newest first. Tap an option to check yourself; the answer and explanation open below it.

Biodiversity, plants & animals questions per year: 2016: 5, 2017: 0, 2018: 3, 2019: 3, 2020: 3, 2021: 4, 2022: 3, 2023: 6, 2024: 6, 2025: 2, 2026: 3 Asked in 10 of 11 years · most in 2024 (6)

Practising Environment & ecology? Take it as timed sets of 25 →

UPSC syllabus: “General issues on Environmental ecology, Bio-diversity and Climate Change - that do not require subject specialization.” Sub-topics in the detailed syllabus →

पीकॉक टैरेंटुला (गूटी टैरेंटुला) के बारे में, निम्नलिखित कथनों पर विचार कीजिए :

  1. I.यह एक सर्वभक्षी परुष-कवची (क्रस्टेशियाई) है।
  2. II.इसका प्राकृतिक आवास भारत में केवल कुछ वनों तक ही सीमित है।
  3. III.अपने प्राकृतिक आवास में यह एक वृक्षीय जाति है।

उपर्युक्त कथनों में से कौन-सा/कौन-से सही है/हैं?

Read this question in English

Regarding Peacock tarantula (Gooty tarantula), consider the following statements:

I. It is an omnivorous crustacean.

II. Its natural habitat in India is only limited to some forest areas.

III. In its natural habitat, it is an arboreal species.

Which of the statements given above is/are correct?

(a) I only · (b) I and III · (c) II only · (d) II and III

उत्तर और व्याख्या · explanation in English

Answer: (d) II और III

The Gooty (peacock) tarantula, Poecilotheria metallica, is a spider, so it is an arachnid and not a crustacean, and it hunts animal prey rather than being an omnivore. It is a tree-dwelling species restricted to a few forest patches in the Eastern Ghats, so II and III are correct.

  • ✗ I Tarantulas belong to the class Arachnida (order Araneae, family Theraphosidae), not to the crustaceans, and Britannica says they feed mainly at night on insects and occasionally on small frogs, toads and mice, so 'omnivorous crustacean' is wrong on both counts.
  • ✓ II The species is endemic to India and is Critically Endangered because it is restricted to a small, highly degraded forest area in the Eastern Ghats (between Nandyal and Giddalur, Andhra Pradesh); a later record extended its range to the Eastern Ghats of Tamil Nadu, but it remains confined to a few forest areas.
  • ✓ III Its genus, Poecilotheria, is the only tarantula genus that is specifically arboreal, living in trees in the forests of peninsular India and Sri Lanka.

Remember · Gooty (peacock) tarantula, Poecilotheria metallica: an arboreal spider (arachnid), endemic to a small Eastern Ghats forest area in India; IUCN Critically Endangered.

Sources

  • Journal of Threatened Taxa (2019) 11(10): Range extension of the Gooty Tarantula Poecilotheria metallica in the Eastern Ghats of Tamil Nadu, India ↗ · reference work “This species is endemic to India, and according to the current IUCN Red List of Threatened Species, the species is categorized as Critically Endangered, as it is restricted to a 100km² highly degraded forest between Nandyal and Giddalur in the Eastern Ghats of Andhra Pradesh … The old world genus Poecilotheria Simon, 1885 of the subfamily Poecilotheriinae is the only genus specifically arboreal in habit, occurring largely in the dry deciduous and evergreen forests or wooded areas in peninsular India and Sri Lanka”
  • Encyclopaedia Britannica: Tarantula (taxonomy) ↗ · reference work “Taxonomy Kingdom: Animalia Phylum: Arthropoda Class: Arachnida Order: Araneae Infraorder: Mygalomorphae Family: Theraphosidae … many make burrows in soil and feed mainly at night on insects and occasionally small frogs, toads, and mice; some species are arboreal.”

Question and answer: UPSC's official GS Paper I (2025, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 1 Oct 2026 (how we verify). Permalink ·

निम्नलिखित युग्मों पर विचार कीजिए :

पादपवर्णन
I.कसावाकाष्ठीय झाड़ी
II.अदरकआभासी-तनायुक्त शाक
III.मालाबार पालकशाकीय आरोही लता
IV.पुदीनावार्षिक झाड़ी
V.पपीताकाष्ठीय झाड़ी

उपर्युक्त युग्मों में से कितने सही सुमेलित हैं?

Read this question in English

Consider the following pairs:

I. Cassava — Woody shrub

II. Ginger — Herb with pseudostem

III. Malabar spinach — Herbaceous climber

IV. Mint — Annual shrub

V. Papaya — Woody shrub

How many of the above pairs are correctly matched?

(a) Only two · (b) Only three · (c) Only four · (d) All the five

उत्तर और व्याख्या · explanation in English

Answer: (b) केवल तीन

Cassava (woody shrub), ginger (herb with a pseudostem) and Malabar spinach (climber) are matched correctly. Mint is a herbaceous perennial, not an annual shrub, and papaya is a tree-like herb, not a woody shrub. That makes three correct pairs.

  • ✓ I FAO describes cassava as a woody perennial shrub that grows 1 m to 5 m tall.
  • ✓ II Ginger is a slender perennial herb; its leafy shoot is a pseudostem formed by the leaf sheaths, not a true stem.
  • ✓ III Malabar spinach (Basella) has soft, succulent, branched climbing stems, so it is a herbaceous climber.
  • ✗ IV Mint is a herbaceous perennial that spreads by stolons; it is a herb, not a shrub.
  • ✗ V FAO calls papaya a fast-growing tree-like herb, so it is not a woody shrub.

Remember · Cassava = woody shrub; ginger = herb with a pseudostem; Malabar spinach = climber; mint = herbaceous perennial; papaya = tree-like herb (not woody).

Sources

Question and answer: UPSC's official GS Paper I (2025, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 1 Oct 2026 (how we verify). Permalink ·

किस संस्था ने जलवायु परिवर्तन और जैव विविधता की हानि के नियंत्रण हेतु प्रकृति पुनःस्थापन विधि [नेचर रेस्टोरेशन लॉ (NRL)] अधिनियमित की?

Read this question in English

Which organization has enacted the Nature Restoration Law (NRL) to tackle climate change and biodiversity loss?

(a) The European Union · (b) The World Bank · (c) The Organization for Economic Cooperation and Development · (d) The Food and Agriculture Organization

उत्तर और व्याख्या · explanation in English

Answer: (a) यूरोपीय संघ

The Nature Restoration Law is a European Union law. The Council of the EU adopted it on 17 June 2024 and it entered into force on 18 August 2024, setting binding targets to restore degraded ecosystems across the EU's land and sea areas.

  • ✓ (a) The European Commission describes the Nature Restoration Law as a key element of the EU Biodiversity Strategy, with binding restoration targets for habitats and species that should cover at least 20% of the EU's land and sea areas by 2030.
  • ✗ (b) The World Bank Group describes its role as providing financial products and policy advice to countries; it is not the body that enacted this law.
  • ✗ (c) The OECD describes itself as an international organisation that works to build better policies; it did not enact this law.
  • ✗ (d) The FAO describes itself as a specialized agency of the United Nations that leads international efforts to defeat hunger; it did not enact this law.
  • • Since then The Commission's page now calls the same law the 'Nature Restoration Regulation'; in 2024 it used 'Nature Restoration Law'. The content and the dates above are unchanged.

Remember · The Nature Restoration Law is a European Union regulation, in force since 18 August 2024, with binding targets to restore ecosystems by 2030 and 2050.

Sources

Question and answer: UPSC's official GS Paper I (2025, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 1 Oct 2026 (how we verify). Permalink ·

The Syllabus X-Ray of this topic

2 of its 7 sub-topics are Core

2 Core · 1 High · 2 Steady · 2 Rare

  • Core #1Animals in the news: species & habitats · 25 questions
  • Core #27Plants & their uses · 8 questions
  • HighIUCN Red List & threatened species · 3 questions

The X-Ray ranks all 928 sub-topics of the UPSC syllabus by what UPSC has asked since 2016. The 60 Prelims Core sub-topics are behind 51% of Prelims questions.

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