- ADecreases sperm motility
- BIncreases sperm motility
- ✓Barrier to prevent fusion of sperm and ova
- DIncreases phagocytosis
These methods prevent the contact of sperm and ovum with the help of barriers. Such methods are $(i)$ Condoms are the barriers made of thin rubber/latex sheath used to cover the penis in the male or vagina and cervix in female. It prevents the deposition of the ejaculated semen into the vagina of the female. $(ii)$ Diaphragms, cervical cap and vaults are the barriers made of rubber that are inserted into the female reproductive tract to cover the cervix during coitus. $(iii)$ Spermicidal creams, jellies and foams are used along with these barriers to increase their contraceptive efficiency
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$(1)$ End of process of oogenesis
$(2)$ Induces the completion of the second meiotic division
$(3)$ The corpus luteum degenerates
$(4)$ Signals for maintain progesterone level in blood
$(5)$ Formation of zygote
$\begin{array}{|l|l|} \hline Column\,\,-I & Column\,\,-II \\ \hline 1.\,\,Pituitary\,\,gland & p.\,\,Trachea \\ \hline 2.\,\,Thyroid\,\,gland & q.\,\,Bony\,\,cavity\,\,(Sella\,\,tursica) \\ \hline 3.\,\,Thymus & r.\,\,Anterior\,\,part\,\,of\,\,kidney \\ \hline 4.\,\,Adrenal\,\,glands & s.\,\,Dorsal\,\,side\,\,of\,\,the\,\,heart\,\,and\,\,aorta \\ \hline \end{array}$
| Dominant | Recessive |
| A. Terminal | i. Axial |
| B. Round | ii. Wrinkled |
| C. Tall | iii. Dwarf |
| D. Green colour of pod | iv. Yellow colour of pod |