Class VIII

The period of life when the body undergoes changes, leading to reproductive maturity, is called?
  1. Puberty
  2. Adolescence
  3. Metamorphosis
  4. Menarche
Metamorphosis in frog is controlled by which of the following hormone?
  1. Thyroid
  2. Insulin
  3. Adrenalin
  4. Thyroxine
Which of the following is the male hormone that is secreted by the testes at the onset of puberty?
  1. Estrogen
  2. Insulin
  3. Adrenalin
  4. Testosterone
The thread like structure in the fertilized egg is known as:
  1. Chromosomes
  2. Zygote
  3. Foetus
  4. Embryo
The first menstrual flow at puberty in females is termed as ________
  1. Menopause
  2. Menstruation
  3. Ovulation
  4. Menarche
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