List of top Biology Questions asked in UP Board XII

What are stem cells?
Who among the following proposed that evolution of life forms occurred due to use and disuse of organs?
Which of the following methods is used to introduce foreign DNA into the host cells?
Pollen grains are well preserved as fossils because of the presence of which of the following?
Describe the dihybrid cross with the help of a checker-board.

Write short notes on the following: 

(i) Bioinformatics 

(ii) Amniocentesis

Write a note on seven contrasting traits studied by Mendel in pea plants.
Differentiate between Phenotype and Genotype.
Write a short note on over-exploitation and co-extinction.
Write a note on allergy.
Describe the symptoms of Pneumonia and Amoebiasis.
What is genetic engineering? Write any two applications of genetic engineering.
Describe mutation with an example.
Define productivity in an ecosystem.
Write any two differences between DNA and RNA.
What is active and passive immunity?
What is Human Insulin?
Write the names of any two blue-green algae (Cyanobacteria) responsible for nitrogen fixation.
Write the full form of IUD.
Name any one sex-linked recessive disorder in human beings.
Write any two causes of biodiversity loss.
'Down's Syndrome' is caused due to:
How many meiotic divisions are required to produce 108 microspores from microspore mother cells?
The Widal test is used for the diagnosis of which disease?
The endosperm of an angiospermic plant is: