Assertion(A): The embryo gets nutrition from the mother's blood with the help of a special tissue
called placenta.
Reason(R): Placenta transfers glucose and oxygen
from the mother to the embryo.
a) Both A and R are true, and R is the correct explanation of the assertion.
b) Both A and R are true, but R is not the correct explanation of the assertion.
c) A is true, but R is false.
d) A is false, but R is true.

Dear student,
Please find below the answer:

The correct option is (b).
The placenta is a disc that is found embedded in the uterine wall. The embryo's side of this tissue contains villi and the mother's side has blood spaces. This increases surface area for diffusion of nutrients, oxygen etc. from mother to the embryo, thereby helping the embryo getting nutrition from the mother. 

Hope this clears your doubt.
Regards.
 

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