Question 4 :
As compared to whole body, the head of new born human baby is<br>

Question 5 :
State true or false&#160;<br/>(i) A zygote is always formed inside the body.<br/>(ii) Zygote may represent &#34;overwintering stage&#34; in life cycle of an organism

Question 9 :
Which among the following is not the function of testes at puberty<br/>(i) Formation of germ cells<br/>(ii) Secretion of testosterone<br/>(iii) Development of placenta<br/>(iv) Secretion of Oestrogen<br/><br/>

Question 12 :
<table class="wysiwyg-table"><tbody><tr><td>Progesterone, ovulation, 28 days,&#160;puberty, menarche,&#160;45-50 years, menopause,&#160;fallopian tube,&#160;13$^{th}$ or 14$^{th}$&#160;days<br/></td></tr></tbody></table>Fill in the blanks using the given words.<br/>Menstrual cycle is a series of cyclic changes that occur in the reproductive system of human females with a periodicity of about ..........(1) ........... <br/>The cycle begins with ..........(2)........... <br/>The first menstruation is called as ..........(3) ........... <br/>It stops between age of .........(4) ............<br/>Stoppage of menstruation permanently is called as ........(5) .............<br/>At about the middle of the menstrual cycle on .........( ) ..........., the growing follicle bursts and mature ovum is released from the ovary under the influence of higher levels of estrogen and LH. <br/>The phenomenon is called as .........(7).............. <br/>The empty follicle grows into corpus luteum that secretes hormone ........... (8) .......... <br/>The released ovum is drawn into ..................(9) ...................... with the help of inward lashing movements of its internal cilia.<br/>It rests for 1-2 days in the ampulla. <br/>The period is called as fertility period.<br/>Pregnancy can occur only during this phase.<br/>

Question 13 :
Upon fertilization while ovule develops into seed. Which structure develop from a carpel?

Question 16 :
<table class="wysiwyg-table"><tbody><tr><td></td><td><b>List I</b></td><td></td><td><b>List II</b></td></tr><tr><td>A</td><td>Development of sex organs</td><td>1</td><td>Goitre</td></tr><tr><td>B</td><td>Stopage of menstrual cycle</td><td>2</td><td>Female child</td></tr><tr><td>C</td><td>Eggs fuses with 22 + X</td><td>3</td><td>Puberty</td></tr><tr><td>D</td><td>Deficiency of iodine</td><td>4</td><td>Menopause</td></tr></tbody></table>

Question 18 :
If a germ cell in a female gonad and a germ cell in a male gonad begin undergoing meiosis simultaneously, what will be the ratio of ova and sperms produced?<br>

Question 19 :
Assertion: During fertilization only head of spermatozoa enters egg. Reason: If several spermatozoa hit the egg at same time, all can enter the egg.