List of top Questions asked in UP Board XII

Pollen grains are formed in which organ of the flower?

What is an ecosystem? Describe the components of an ecosystem.

What is DNA fingerprinting technique? Describe in detail with a diagram.

What is cancer? Describe its causes and diagnosis in detail.

Draw a labelled diagrammatic sectional view of seminiferous tubules.

Describe palaeontological evidence with an example.

Describe polyembryony with an example.

Describe the false fruit with a diagram.

What is allergy? Explain with an example.

Explain convergent evolution with an example.

Describe the symptoms of Down syndrome.

Describe the process of decomposition with a diagram.

Describe the Hardy-Weinberg principle.

Describe the ecological pyramid in brief.

State the importance of the artificial insemination technique.

Write a short note on transfer RNA (tRNA).

Write the names of any two atmospheric nitrogen-fixing microorganisms.

What is an external parasite? Explain with one example.

Write the names of any two projects to save rivers from pollution.

What is gel electrophoresis? Explain.

Write the complete form of the BOD abbreviation.

Give one example of commensalism.

What is a pest resistant plant? Give one example.

Who proposed the chromosomal theory of inheritance?

Write the name of any one transgenic animal.