Question Set-4 || Sample Paper 9 || CBSE Class 12 Science

Q48 Process of sewage water treatment before it can be discharged into natural water bodies

Q47 State how the constant internal environment is beneficial to organisms

Q46 Name any two copper releasing IUDs

Q45 Explain adaptive radiation with the help of a suitable example

Q44 Effect of the high concentration of L. H on a mature Graffian follicle

Q43. 2 factors responsible for conferring stability to double helix structure of DNA

Q42 Example of a plant which came into India as a contaminant and is a cause of pollen energy

Q41 Write an alternate source of protein for animal and human nutrition

Q40 Stage of cell division where segregation of an independent pair of chromosomes occurs

Q39 Describe the Hershey and Chase experiment.

Q38 Explain, giving 3 reasons, why tropics show greatest levels of species diversity

Q37 Answer the questions based on the facts given