List of top Questions asked in Bihar Board XII- 2025

Describe biofortification in brief.
Write any two differences between integument and testa.
What do you understand by ground water? Describe the causes for its depletion and remedies.
What is the importance of Red Data Book?
Present a neat, clean, and well-labelled diagram of an embryo inside the human uterus.
Explain any two differences between c-DNA and s-DNA.
Explain the differences between any two of the following: (a) Food chain and food web
What is epistasis?
What are pathogens? Write the names of any one plant and one animal pathogen.
What is gene library?
What is mycorrhiza?
Mention any two harmful effects of sewage.
What are sacred groves?
Define commensalism and write two examples.
Write any two symptoms of sickle cell anaemia.
Define germplasm.
Mention any two advantages of genetically modified animals.
Write the names of any four species along with their scientific names.
Mention any two benefits of self-pollination.
What do you mean by camouflage?
Write two differences between ontogeny and phylogeny.
What is Klinefelter syndrome?
What is a man with female characteristics called?
At which of the following stages is the embryo transferred to the fallopian tube?
What is morula?