List of top Biology Questions asked in UP Board XII

Choose the correct option and write in your answer-book: Genetic engineering is useful in:
What do you mean by Mendelian disorders? Give an example of an autosome-linked Mendelian disorder.
What is the haplodiploid sex determination system?
Define primary and secondary productivity.
What is placenta? Describe the different functions of placenta in brief.
With the help of a suitable diagram, explain the classical experiment of S.L. Miller regarding the origin of life.
Describe the functions of vegetative and generative cells of a mature pollen grain with a suitable diagram.
What is adaptive radiation? Describe it with an example.
What are lymphocytes? Briefly describe the functions of two special types of lymphocytes present in our blood.
Briefly explain the different steps involved in the construction of recombinant DNA.
Describe the structure and functions of an antibody.
What is a trophic level? Comment on different types of trophic levels in an ecosystem.
Describe different abiotic and biotic agents of pollination in detail.
Describe the characteristic features of the human genome.
What is an ecological pyramid? Describe different types of ecological pyramids in brief.
Write short notes on the following: Effect of invasive alien species
Endangered species and their conservation
Comment upon the following: Infectious diseases
Describe gel electrophoresis technique in brief.
Comment on the following: Auto-immune disease Opioids
Give an example where more than two alleles govern the same character.
Name the food chain which begins with dead and decaying organic matter.
Who propounded the chromosomal theory of inheritance?
Which hormone is secreted by corpus luteum?
Who among the following proposed that evolution of life forms occurred due to use and disuse of organs?