Assertion : Zona pellucida is glycoproteinous in nature and dissolved during the event of implantation .
Reason : The blastocyst , along with zona pellucida enters in decidua of uterus to protect itself from uterine acidic medium .

During fertilization, zona pellucida is dissolved by

Assertion: Only one sperm can fertilise an ovum. Reason: During fertilisation, a sperm comes in contact with zona pellucida layer of the ovum and induces changes in the membrane that blocks the entry of additional sperms.

Assertion :- Acid which reach intestine does not damage it. Reason :- The mucous along with the bicarbonates from the pancreas protects the intestinal mucosa.

Assertion :- Acid which reach intestine does not damage it. Reason :- The mucous along with the bicarbonates from the pancreas protects the intestinal mucosa.

Assertion : Presence of zona pallucida over the fertilized ovum prevents ectopic pregnancy . Reason : Zona pellucida helps the ovum to penetrate endometrium .

Assertion : Presence of zona pallucida over the fertilized ovum prevents ectopic pregnancy . Reason : Zona pellucida helps the ovum to penetrate endometrium .

Assertion: The cells divide without any increase in size up to morula stage. Reason: Zona pellucida remains intact till cleavage is complete.

[" Which layer of blastocyst gets "],[" attached to the endometrium at the "],[" time of implantation? "],[" Trophoblast "],[" Zona pellucida "],[" Inner cell mass "],[" Corona radiata "]

Given below are assertion and reason. Poin t out if both are true and the reason is correct explanation (A), both are true but reason is not correct explanation (B), assertion is ture but reason is wrong © and both are wrong(D) Assertion: in morula stage cell divides without increase in size. Reason. Zona pellucida remains till cleavage is finished