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प्रश्न
During adolescence, several changes occur in the human body. Mark one change from the following associated with sexual maturation in boys.
विकल्प
loss of milk teeth
increase in height
cracking of voice
weight gain
उत्तर
cracking of voice
Explanation:
Cracking of voice in males is brought about by the male hormone testosterone, which is produced after sexual maturation.
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संबंधित प्रश्न
Describe, in brief, the changes the uterus undergoes
(i) to receive the zygote.
(ii) if zygote is not formed
What is placenta?
What are the changes seen in girls at the time of puberty?
What is puberty? Who attains puberty at an earlier age in human beings : male or female (boy or girl)?
What is gestation period? How much is the gestation period in humans?
Which structure in human female is equivalent to the vas deferens in the male?and in what respect the structures are equivalent?
Rewrite the terms in the correct order so as to be in a logical sequence.
Implantation, ovulation, child birth, gestation, fertilisation.
Choose the correct answer:
Binary fission is a method of __________
Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with a suitable idea given in Column ‘I’.
| Column I | Column II |
| (i) Acrosome
(ii) Ovulation (iii) Sperm (iv) Menopause (v) Implantation (vi) Fertilization (vii) Contraception in males |
(a) Male gamete
(b) Oviduct (c) Uterus (d) Spermatozoa (e) Progesterone (f) Stoppage of the menstrual cycle (g) Sudden change in genes |
How does human sperm locomote?
