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100+ Free BSEH SS Biology Practice Questions

Board of School Education Haryana (BSEH) Senior Secondary Biology (Class 12 — Biology elective, date-sheet code 865) practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: BSEH SS Biology Exam

3 hours

Typical BSEH Senior Secondary Biology theory exam duration

BSEH date-sheet logistics (code 865)

70 + 30

Typical theory + practical mark split for Class 12 Biology

BSEH Class 12 Biology syllabus structure

33%

Common Senior Secondary subject pass floor for BSEH theory electives

BSEH Senior Secondary notification practice

Code 865

Biology subject code on BSEH Senior Secondary date sheet

BSEH date sheet

English MCQ adaptation

This free local bank is not the official Senior Secondary paper format

OpenExamPrep practice policy

BSEH Senior Secondary Biology is a Class 12 public-exam theory elective of about 3 hours (date-sheet code 865; theory ~70 + practical ~30) with a 33% pass floor, covering reproduction through ecology — not a pure MCQ board paper. This free 2026 bank is an English MCQ study adaptation for NCERT/BSEH-aligned Class 12 Biology concepts and calculations.

Sample BSEH SS Biology Practice Questions

Try these sample questions to test your BSEH SS Biology exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In angiosperms, the mature male gametophyte is represented by the:
A.Pollen mother cell
B.Microspore mother cell
C.Germinated pollen grain with two male gametes
D.Tapetal cell
Explanation: A mature pollen grain germinates to form a pollen tube carrying two male gametes (from the generative cell) and a vegetative nucleus — that is the male gametophyte.
2The embryo sac of a typical flowering plant is usually:
A.8-nucleate and 7-celled
B.8-nucleate and 8-celled
C.7-nucleate and 7-celled
D.4-nucleate and 4-celled
Explanation: Polygonum-type embryo sac has 8 nuclei organised into 7 cells: egg apparatus (3), antipodals (3), and a central cell with two polar nuclei.
3Double fertilisation in angiosperms results in:
A.Zygote only
B.Endosperm only
C.Zygote and primary endosperm nucleus (triploid)
D.Two zygotes
Explanation: One male gamete fuses with the egg to form a diploid zygote; the other fuses with two polar nuclei to form a triploid primary endosperm nucleus (PEN).
4Which layer of the anther wall is nutritive for developing pollen grains?
A.Epidermis
B.Endothecium
C.Middle layers
D.Tapetum
Explanation: The innermost anther wall layer, tapetum, provides nutrition and materials (e.g., sporopollenin precursors) to developing microspores.
5Apomixis is best defined as:
A.Formation of seeds without fertilisation
B.Fusion of two male gametes
C.Self-pollination within a closed flower
D.Polyembryony only due to adventive embryos
Explanation: Apomixis produces seeds (and progeny) without fertilisation, preserving maternal genotype — useful in hybrid seed technology.
6In a typical dicot embryo, the embryonic root is called the:
A.Plumule
B.Radicle
C.Epicotyl
D.Coleoptile
Explanation: The radicle is the embryonic root; the plumule is the embryonic shoot.
7Which of the following promotes outbreeding in flowering plants?
A.Cleistogamy
B.Self-incompatibility
C.Homogamy only
D.Absence of pollinators
Explanation: Self-incompatibility prevents self-pollen from fertilising ovules of the same plant, favouring cross-pollination/outbreeding.
8Endosperm in angiosperms is generally:
A.Haploid
B.Diploid
C.Triploid
D.Tetraploid
Explanation: Primary endosperm nucleus forms by fusion of one male gamete (n) with two polar nuclei (n + n), giving 3n endosperm in most angiosperms.
9In humans, spermatogenesis occurs in the:
A.Epididymis
B.Seminal vesicles
C.Seminiferous tubules
D.Prostate gland
Explanation: Seminiferous tubules of the testes are the sites of spermatogenesis; epididymis is mainly for maturation and storage.
10The hormone primarily responsible for ovulation is a surge of:
A.FSH only
B.LH
C.Progesterone
D.Prolactin
Explanation: A mid-cycle LH surge triggers ovulation of the mature Graafian follicle.

About the BSEH SS Biology Practice Questions

Verified exam format metadata for Board of School Education Haryana (BSEH) Senior Secondary Biology (Class 12 — Biology elective, date-sheet code 865) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.