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  • Consider the following statements: 1. Chorio-vitelline placenta is present in kangaroos. 2. In chorio-allantoic placenta, the yolk sac remains undeveloped. 3

Consider the following statements:

1. Chorio-vitelline placenta is present in kangaroos.

2. In chorio-allantoic placenta, the yolk sac remains undeveloped.

3. Chorionic type of placenta is found in human beings. 

4. Chorionic type of placenta is found in kangaroos.

5. Chorio-vitelline placenta is present in humans.

How many of the given statements are correct?

Option: 1

Three statements are correct


Option: 2

Only third statement is correct


Option: 3

All five statements are correct


Option: 4

None of these are correct


Answers (1)

best_answer

As we have learnt:

Chorio-vitelline or “Yolk-sac” placenta- 

  • It is a primitive type of placenta found in some of the marsupials. E.g., Opossum and Kangaroo. 

Chorio-allantoic placenta- 

  • In chorio-allantoic placenta, the yolk sac remains undeveloped. 

Chorionic placenta- 

  • The chorionic placenta is formed of a thickened layer of chorion containing sinuses filled with maternal blood.
  • Chorionic type of placenta is found in human beings. 

Hence, the statements 1, 2 & 3 are correct. So, the correct answer is option a.

Posted by

shivangi.bhatnagar

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