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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

Cu ions released from copper -releasing Intra Uterine Devices (IUDs)

  • make uterus unsuitable for implantation

  • increase phagocytosis of sperms

  • suppress sperm motility 

  • prevent ovulation


A.

make uterus unsuitable for implantation

Intra- uterine device (IUD) is a small device made up pf copper, plastic or stainless steel. It is inserted into the uterus by a doctor and left in in place. It prevents implantation. iIt can be left in place for long periods. It may cause bleeding and discomfort. IUD may come out. 

Intra- uterine device (IUD) is a small device made up pf copper, plastic or stainless steel. It is inserted into the uterus by a doctor and left in in place. It prevents implantation. iIt can be left in place for long periods. It may cause bleeding and discomfort. IUD may come out. 


The prenatal technique to determine the genetic disorders in a foetus is called :
  • Laproscopy
  • Amniocentesis
  • Abstinence
  • Coitus nterruptus.

B.

Amniocentesis

What is correct about a test tube baby?
  • Fertilization in female's genital tract and growth in test tube
  • Rearing of premature born baby in an incubator
  • Fertilization outside and gestation inside mother's womb
  • Both fertilization and development are done outside the female genital tract.

C.

Fertilization outside and gestation inside mother's womb

Progesterone is the contraceptive pill which :
  • Prevents ovulation
  • prevent entry of sperms
  • prevent implantation
  • All the above

D.

All the above

The birth control device not used by women is :
  • Diaphragm
  • Oral pill
  • Condom
  • Copper T

C.

Condom

The main factor for the growth of human population in India is :
  • high birth rate
  • less death rate
  • lack of education
  • All the above

D.

All the above