Punjab Board Class 12 Biology — Important Questions (Board Exams 2027)

Which layer of the microsporangium wall nourishes the developing pollen grains?

What is the process of formation of microspores from the pollen mother cell called?

In double fertilisation, the fusion of one male gamete with two polar nuclei produces:

Which structure is responsible for producing hCG (human chorionic gonadotropin) during early pregnancy, and what is its primary function?

A sperm reaches the ampullary region of the fallopian tube. It comes in contact with the ovum. Which of the following correctly describes the sequence of events immediately after sperm-ovum contact?

In oogenesis, which of the following statements correctly distinguishes it from spermatogenesis regarding the number of functional gametes produced per primary cell?

ZIFT and IUT are both embryo transfer techniques used in ART. The correct distinction between them is:

Amniocentesis is a foetal diagnostic technique. Its MISUSE that is specifically mentioned in the NCERT textbook relates to:

A patient is diagnosed with a Sexually Transmitted Infection. The doctor tells her that the infection CANNOT be completely cured even with proper treatment. Which of the following infections is she most likely suffering from?