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: Plant Reproduction →

26. The anther containsAsked in WBCS Main Paper 4 2021
27. Pollen grains in a flower produced in A) Anther B) Sepals C) Petals D) PistilAsked in DENTAL SURGEON (SCREENING) EXAMINATION 2023
28. One of the most resistant organic material- sporopollenin is present in –Asked in Co operative Supervisor & Environment Supervisor (Group C) Exam 2023
29. The anthers are important because they containAsked in mineral dev officier 2025
30. Which one of the following is the correct sequence of events during sexual reproduction in plants?Asked in UPSC CDS 1 2020
31. Which one of the following plants has unisexual flowers?Asked in UPSC NDA 1 2022
32. Which of the following reproductions is found in plants alone?Asked in WBPSC CS Prelims 2023
33. Consider the following statements: 1. The process of reproduction in plants is generally considered to be more advantageous over asexual reproduction. 2. The process of asexual reproduction in plants is generally considered to be more advantageous over sexual reproduction. Which of the statements given above is/are correct?Asked in Assistant Eng. (Mechanical) Competitive Examination, 2023
34. How much % of brood stock are injected with inducing material in sympathetic breeding before releasing in the wet/dry bund ?Asked in Asst. Fisheries Development Officer 2024
35. What is the main reason that bryophytes are referred to as “amphibians of the plant kingdom”?Asked in ASO 2025
36. In a typical flower, germinating pollen grains pass through several parts of the gynoecium before they reach the ovule. A list of the parts of gynoecium is given below in different combinations. Choose the combination that represents the correct sequence of pollen tube pathway/journey :Asked in UPSC NDA 1 2021
37. In angiosperms, pollen grain germinates to produce two male gametes. Which one of the following functions is carried out by these gametes ?Asked in UPSC NDA 2 2023
38. Double fertilization is a characteristic feature ofAsked in JUNIOR laboratory assistant 2025
39. What other term is used for triple fusion ?Asked in Co operative Supervisor & Environment Supervisor (Group C) Exam 2023
40. Pollination is best defined asAsked in BPSC Prelims Exam 67th Re Exam
41. Which one of the following about anemophilous plants is correct?Asked in UPSC Geoscientist 2020
42. Transfer of pollen grains from the anther to stigma of another flower of the same plant is calledAsked in MPPSC CS Prelims 2019
43. Relationship between a flower and honey- bee will help the flower for/inAsked in UPSC NDA 2 2023
44. In a bisexual flower, if androecium and gynaecium mature at different times, the phenomenon is known asAsked in UPPCS Prelims 2002
45. Flowers without petals are pollinated byAsked in ASO 2025
46. Pollination by insects is calledAsked in Assistant Conservator of Forest (ACF) 2012
47. Pollination by birds is calledAsked in Section Officer(LDCE) 2021 22 2021
48. How many chromosomes are found in the endosperm of maize?Asked in JPSC CS Prelims 2024
49. If one set of chromosomes for a given plant is represented as N; in case of double fertilization, the zygote and the endosperm nucleus of a diploid plant would have how many sets of chromosomes respectively?Asked in UPSC NDA 2 2018
50. Which one of the following is the correct sequence during sexual reproduction in Angiosperms ?Asked in UPSC NDA 2 2023