In teleosts,reptiles,and birds,the cleavage pattern is:

In humans,fertilization is possible only when,

Identical twins are produced when

Sperm enters from which part of the egg?

Which reproductive adaptation is characteristic of most terrestrial vertebrates but not of most aquatic vertebrates?

Following are some events occurring during the fertilization process. Arrange the $CORRECT$ sequence of events and choose the option given below.
$i$. Fertilizin-antifertilizin reaction.
$ii$. Cortical reaction.
$iii$. Acrosome reaction.
$iv$. Karyogamy.
$v$. Capacitation of sperms.