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

A student observes that certain bacteria thrive in hot springs with highly acidic conditions and low oxygen levels. These bacteria most likely belong to which group of Archaebacteria?

Euglena is described as a 'connecting link' between plants and animals. Which combination of features BEST justifies this description?

In the life cycle of Plasmodium, malaria is caused when the parasite undergoes its asexual phase in the human body. Which specific event in the human body directly causes the characteristic fever and chills of malaria?

Which of the following plants belongs to the family Fabaceae (Papilionaceae)?

In the family Malvaceae, the stamens are joined together by their filaments to form a tube. This condition is called:

The fruit of Poaceae (grass family) is called:

Which of the following is present in plant cells but NOT in animal cells?

The movement of water molecules from a region of higher concentration to lower concentration through a semipermeable membrane is called:

Lysosomes are called 'suicidal bags' because they: