MCQ
Cryosurgery is done using:
- ALiquid Hydrogen
- BLiquid Sodium
- CLiquid Ammonia
- DLiquid Nitrogen
Explanation:
Cryosurgery is a medical technique which uses cold temperature for the surgical process.
Due to the extreme cold temperature with the liquid nitrogen, the abnormal tissues are destroyed.
This treatment is used to destroy the tumour cells and lesions.
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$(1)$ medical termination of pregnancy $(MTP)$ during first trimester is generally safe
$(2)$ generally chances of conception are nil until mother breast feeds the infant upto two years
$(3)$ intrauterine devices like copper $T$ are effective contraceptives
$(4)$ contraception pills may be taken upto one week after coitus to prevent conception.
Which two of the above statements are correct?
Reason : Adaptive forms of a given trait tend to become more common; less adaptive ones become less common or disappear.