List of top Questions asked in PSEB XII

Define sewage. Why is it harmful to us?
What are bioreactors. Name its two types.
Expand PCR. Mention its any one importance in biotechnology.
Write two advantages of GM crops.
Write any two points of differences between grazing and detritus food chain.
What do you mean by hotspots of biodiversity?
What is DNA fingerprinting? Mention its two applications.
Explain the structure of transcription unit with diagram.
Dragonflies are used as biocontrol agents to protect the crops from …………….
Sacred groves is an example of…………….conservation
Write two functions of tapetum.
What are the major components of seminal plasma?
Name two permanent methods of birth control.
Expand: ZIFT and ICSI
What do you mean by law of segregation.
What will the progeny be if a woman carrier for haemophilia marries a normal man?
What is convergent evolution. Give an example
In national park protection is given to
Copper T is used as birth control device by women
Sickle cell anaemia is an example of point mutation.
Vaccination is a type of innate immunity
In gel electrophoresis DNA fragments separate according to their charge
Zygote divides to form ……….which is implanted in uterine wall
Substances which cause allergy are called ……..
Vertebrate forelimbs are example of