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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

Which one of the following statement is incorrect about menstruation? 

  • During normal menstruation, about 40 mL blood is lost

  • The menstrual fluid can easily clot

  • At menopause in a female, there is especially abrupt increase in gonadotropic hormones

  • The beginning of the cycle of menstruation is called menarche


B.

The menstrual fluid can easily clot

During normal menstruation, approximately 40 mL of blood and an additional 35 mL of serous fluid are lost. The menstrual fluid is normally non-clotting because a fibrinolysin is released along with the necrotic endometrial material.

The cause of menopause is burning out of the ovaries. At about age 45 only a few primordial follicles remain to be stimulated by FSH and LH. The oestrogen production falls below a critical value and the gonadotropic hormones (FSH and LH)  are produced regularly from the pituitary so, a there level increase in body.

During normal menstruation, approximately 40 mL of blood and an additional 35 mL of serous fluid are lost. The menstrual fluid is normally non-clotting because a fibrinolysin is released along with the necrotic endometrial material.

The cause of menopause is burning out of the ovaries. At about age 45 only a few primordial follicles remain to be stimulated by FSH and LH. The oestrogen production falls below a critical value and the gonadotropic hormones (FSH and LH)  are produced regularly from the pituitary so, a there level increase in body.


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

D.

All the above

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

B.

Amniocentesis

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

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

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

C.

Condom