NEB Question Browser
Explore Class 12 Biology past and model questions by chapter, year, marks and question type.
178 questions found
Which of the following structures in a plant is primarily responsible for regulating transpiration?
Xylem
Stomata
Root hairs
Phloem
Explain the basic steps involved in IVF. Mention any two potential risks or complications associated with IVF.
In which cross, the genotypic and phenotypic ratio are same? Explain it with reference to Mirabilis jalapa.
Apply your understanding of various processes involved in the ascent of sap in cohesion tension theory for the maximum uptake of water in plants.
What is the substance sampled during amniocentesis?
Placental cells
Amniotic fluid
Maternal blood
Umbilical cord tissue
How do organic fertilizers contribute to sustainable agricultural practices compared to chemical fertilizers, and why is prioritizing their use advantageous?
Show the correct path for the flow of urine.
Renal pelvis, ureter, urinary bladder, urethra
Renal pelvis, ureter, urethra, urinary bladder
Renal pelvis, urinary bladder, urethra, ureter
Renal pelvis, urethra, ureter, urinary bladder
If the person has puffy appearance, moon face, low body temperature and has intolerance to cold, what do you think he is suffering from?
Grave's disease
Conn's disease
Myxoedema
Hashimoto's disease
Label the parts C and D
Which is the correct sequence in embryonic development of frog?
Morula, blastula, gastrula
Blastula, morula, gastrula
Morula, gastrula, blastula
Blastula, gastrula, morula
What is the figure about, and why is it important?
Which of the following epithelium forms the inner lining of vagina?
Columnar
Cuboidal
Stratified keratinized squamous
Stratified non-keratinized squamous
Human alimentary canal is a complete tube designed for ingestion, digestion, absorption, assimilation and egestion process. Draw a labelled diagram of human digestive system and explain the parts of alimentary canal. What would happen if the bile duct becomes blocked?
Human ear is concerned with hearing and equilibrium. With the help of a labelled diagram, explain the structure of human ear. What would happen if the opening of Eustachian tube becomes blocked?
Draw a labelled diagram of T.S. of a typical dicot stem and mention any two anatomical characteristics of its vascular bundles.
What is the primary function of the cambium in perennial dicot vascular plants?
To produce lateral roots
To provide structural support
To produce new xylem and phloem
To regulate transpiration
Label the parts marked as A and B.
Which of the following genotypes represents monosomy, a type of aneuploidy?
What causes cell elongation in the internodal regions of plants?
Indole acetic acid
Gibberellins
Abscisic acid
Cytokinins
Mention the function of part C.