Question

Given below are four statements each with one or two blanks. Select the option which correctly fills up the blanks in any two statements.
(A) The embryo with 8 to 16 blastomeres is called a (i) .
(B) Embedding of the (i) in the endometrium of the uterus is called implantation and it leads to (ii) .
(C) After implantation, finger like projections appear on the trophoblast called (i) , which are surrounded by the (ii) and maternal blood.
(D) Inner cell mass contains certain cell called (i) cells which have the potency to give rise to all the tissues and organs.

• A. (A)-(i) blastula, (C)-(i) chorionic villi, (ii)-uterine tissue
• B. (B)-(i) blastocyst, (ii) pregnancy, (D)-(i) stem.
• C. (A)-(i) morula, (D)-(i) Sertoli
• D. (B)-(i) morula, (ii) parturition, (C)-(i) fimbriae, (ii)-embryonic tissue

Answer 1

The correct option is B (B)-(i) blastocyst, (ii) pregnancy, (D)-(i) stem.

The Blastocyst formed from the morula attaches itself by means of the trophoblast in the uterine lining or the endometrium and is called implantation and this leads to the pregnancy and the development of the fetus. The inner cell mass of this blastocyst comprises of the embryonic stem cells that are totipotent or the potency to give rise to all the tissues and organs.

So, the correct option is ' -(i) blastocyst, (ii) pregnancy, (D)-(i) stem.'.