Question 2 :
Which of the following changes is not observed in girls at the time of puberty?

Question 3 :
The human body undergoes several changes during adolescence. These changes mark the onset of puberty.

Question 5 :
Which of the following events occur in the part of human reproductive system? 

Question 7 :
Select the mismatched pair of organism and its mode of multiplication.

Question 12 :
At the time of puberty, there is a rapid change in voice in males than females. This is because

Question 16 :
A female of age 24 years attained puberty at the age of 14 years. She has two children born by normal delivery. How many polar bodies are formed in her body till date?<br/>(Each menstrual cycle is of 30 days)

Question 17 :
Statements in column I have to be matched with statements in column II.<br/><table class="wysiwyg-table"><tbody><tr><td>Column I</td><td>Column II</td></tr><tr><td>A.&#160;Animals which give birth to young one</td><td>1. Hydra</td></tr><tr><td>B.&#160;Animal which produces bud</td><td>2. <i>Planaria</i></td></tr><tr><td>C.&#160;An animal which shows regeneration</td><td>3.&#160;Placenta</td></tr><tr><td>D.&#160;Provides nutrition to the developing embryo from the mother</td><td>4.&#160;Cross-pollination</td></tr><tr><td>E.&#160;The pollen transferred from one flower to another</td><td>5.&#160;Germination</td></tr><tr><td>F.&#160;The process in which embryo develops into seedling</td><td>6.&#160;Viviparous</td></tr><tr><td>G.&#160;Fertilized egg in humans gets implanted in</td><td>7.&#160;Menstruation</td></tr><tr><td>H.&#160;When egg in humans is not fertilized</td><td>8.&#160;Uterus</td></tr></tbody></table>