Biology questions with answers

2,759 multiple-choice questions. Open any question for its answer and explanation.

Questions asked in State PSC and UPSC prelims, by topic. Each topic also has notes to read.

Read the notes: Taxonomy →

1. Chemosynthetic bacteria found near sub- marine volcanic vents feed on:Asked in UPSC Geoscientist 2020
2. Who propounded the Theory of Evolution by Natural Selection?Asked in LAW OFFICER CUM JUNIOR DRAFTSMAN 2018
3. Which of the following is the correct pairAsked in TOURIST INFORMATION OFFICER(TIO) 2017
4. Chemoautotrophs are those organisms which obtain energy:Asked in UPSC Geoscientist 2020
5. Which one among the following is likely to be the most 'acidic' in its environment?Asked in KPSC KAS Prelims 2014
6. Litmus, the pH indicator, is obtained from which of the following source ?Asked in ASO 2025
7. Yeast, which is used to make bread, belongs to the group :Asked in UPSC CDS 1 2022
8. Hyphae are :Asked in UPSC CDS 1 2022
9. Where are the largest quantity of cichlids found in India ?Asked in UPSC CDS 2 2019
10. Marsilea, Fern and Horse-tail are examples of which one of the following plant groups ?Asked in UPSC CDS 2 2019
11. Under the Kingdom Plantae, which of the following individuals are predominantly aquatic?Asked in UPSC CDS 2 2020
12. All the individuals of a particular organism, such as rose plants, belong to a taxonomic category calledAsked in UPSC CDS 2 2020
13. Pearls are harvested fromAsked in UPSC CDS 2 2020
14. Rupa and Sachin observed an animal in their school garden. Rupa called it an insect while Sachin identified it as an earthworm. Which one of the following characteristics confirms that it is an insect?Asked in UPSC CDS 2 2021
15. Animals which are marine, bilaterally symmetrical, have a coelom and a notochord, but never form a vertebral column are placed under which one of the following groups?Asked in UPSC CDS 2 2021
16. Which one of the following is a saprophyte ?Asked in UPSC CDS 2 2023
17. A group of individual organism with fundamental similarities is called as aAsked in CGPSC Prelims Exam 2024
18. Which of the following organisms are included in Kingdom Protista as given by R Whittakar?Asked in UPSC Geoscientist 2020
19. Which one of the following groups contributes the maximum number of species to the biosphere?Asked in UPSC Geoscientist 2022
20. Which one of the following is defined as a natural biological unit tied together by the sharing of a common gene pool?Asked in UPSC Geoscientist 2023
21. Name the new species of fish which was discovered recently in Tunga River near the Kudremukh National Park.Asked in KPSC KAS Prelims 2015
22. (Question text is in Kannada and ignored as per instructions)Asked in KPSC KAS Prelims 2017
23. What is the botanical name of opium?Asked in MPPSC CS Prelims 2017
24. Which fish is a surface food eater in water bodies?Asked in MPSC CS Prelims 2012
25. Which fish is suitable for fish farming ?Asked in MPSC CS Prelims 2012