NCERT Class 12 Biology: Scientific Figures & Vector Diagrams

Anatomy of the mature 7-celled 8-nucleate female gametophyte (embryo sac) and double fertilization mechanism.

Synchronized 28-day hormonal coordinates of Pituitary (FSH, LH) and Ovarian (Estrogen, Progesterone) cycles and endometrial changes.

Classification of modern contraceptive methods and clinical workflows of Assisted Reproductive Technologies (ART).

T.H. Morgan's classic Drosophila dihybrid crosses demonstrating X-linked gene linkage vs independent recombination.

Watson-Crick B-DNA helical dimensions and Jacob-Monod Lac Operon transcription regulation in E. coli.

Miller-Urey 1953 chemical evolution apparatus and anatomical divergence vs convergence matrix.

Molecular architecture of Immunoglobulin (IgG) showing heavy/light chains, disulfide bridges, and antigen-binding clefts.

Sequential stages of municipal Sewage Treatment Plant (STP) and biogas plant operation.

E. coli plasmid vector pBR322 restriction map showing selectable markers and insertional inactivation logic.

Comparison of Proinsulin precursor, C-peptide cleavage, and mature active recombinant human insulin.

Comparison of Exponential (J-curve) and Logistic (S-curve) population trajectories with biotic interactions matrix.

Comparison of strictly upright ecological pyramid of energy vs upright grassland and inverted aquatic biomass pyramids.

Alexander von Humboldt's Species-Area curve mathematical formulation and global biodiversity distribution pies.