Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Match List \[\text{I}\] and List \[\text{II}\] and select the answer using the codes.| 1. kUmbilical cord | A. The structure that acts as a bridge between foetus and placenta |
| 2. Neural tube | B. The structure from which the central nervous system develops |
| 3. Cervix | C. The neck of uterus |
| 4. Trophoblast | D. Forms the embryo proper |
A) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: A
Solution :
Umbilical cord is the structure that acts as bridge between foetus and placenta. In the developing vertebrate, neural tube is the embryo's precursor to central nervous systec- which comprises the brain and spinal cord. Cervix is the cylindrical neck of uterus leading into vagina. Trophoblast is the epithelium surrounding the mammalian blastocyst forming outer layer of chorion (extraembryonic membrane).
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