Question:
Match List-I with List-II
List-I (Type of Placenta) List-II (Species/Animal) (A) Diffuse (I) Cow and Sheep (B) Zonary (II) Pig and Mare (C) Cotyledonary (III) Monkey and Man (D) Discoid (IV) Dog and Cat
Choose the correct answer from the options given below
Match List-I with List-II
| List-I (Type of Placenta) | List-II (Species/Animal) |
|---|---|
| (A) Diffuse | (I) Cow and Sheep |
| (B) Zonary | (II) Pig and Mare |
| (C) Cotyledonary | (III) Monkey and Man |
| (D) Discoid | (IV) Dog and Cat |
Choose the correct answer from the options given below
Show Hint
To remember placenta classifications:
- Cotyledonary = Ruminants (Cows/Sheep) \(\rightarrow\) Placentomes.
- Diffuse = Pigs/Horses \(\rightarrow\) Uniform surface.
- Zonary = Carnivores (Dogs/Cats) \(\rightarrow\) Middle band.
- Discoid = Primates (Humans/Monkeys) \(\rightarrow\) Single disc.
- Cotyledonary = Ruminants (Cows/Sheep) \(\rightarrow\) Placentomes.
- Diffuse = Pigs/Horses \(\rightarrow\) Uniform surface.
- Zonary = Carnivores (Dogs/Cats) \(\rightarrow\) Middle band.
- Discoid = Primates (Humans/Monkeys) \(\rightarrow\) Single disc.
Updated On: Jul 24, 2026
- (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
- (A) - (III), (B) - (IV), (C) - (II), (D) - (I)
- (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
- (A) - (IV), (B) - (III), (C) - (II), (D) - (I)
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Placentas are classified anatomically based on the distribution of chorionic villi on the chorionic sac. This distribution determines how maternal and fetal tissues interface for nutrient exchange.
Step 2: Detailed Explanation:
Let us analyze and pair each placental type with its corresponding animal species:
(A). Diffuse Placenta: In this type, the chorionic villi are distributed uniformly over the entire surface of the chorionic sac.
This is characteristic ofpigs andmares (horses). Thus, (A) matches with (II).
(B). Zonary Placenta: Here, the chorionic villi are concentrated in a band or belt-like zone around the middle of the chorionic sac.
This is characteristic of carnivores such asdogs andcats. Thus, (B) matches with (IV).
(C). Cotyledonary Placenta: In this type, the chorionic villi are grouped into distinct, button-like structures called cotyledons.
These cotyledons associate with maternal caruncles on the uterine wall to form placentomes.
This is characteristic of ruminants likecows,sheep, and goats. Thus, (C) matches with (I).
(D). Discoid Placenta: Here, the chorionic villi are concentrated in a single, disc-shaped area on the chorion.
This is characteristic of primates, includingmonkeys andhumans. Thus, (D) matches with (III).
Combining these matches, we obtain: (A) - (II), (B) - (IV), (C) - (I), (D) - (III).
Step 3: Final Answer:
The correct option is (A).
Placentas are classified anatomically based on the distribution of chorionic villi on the chorionic sac. This distribution determines how maternal and fetal tissues interface for nutrient exchange.
Step 2: Detailed Explanation:
Let us analyze and pair each placental type with its corresponding animal species:
(A). Diffuse Placenta: In this type, the chorionic villi are distributed uniformly over the entire surface of the chorionic sac.
This is characteristic ofpigs andmares (horses). Thus, (A) matches with (II).
(B). Zonary Placenta: Here, the chorionic villi are concentrated in a band or belt-like zone around the middle of the chorionic sac.
This is characteristic of carnivores such asdogs andcats. Thus, (B) matches with (IV).
(C). Cotyledonary Placenta: In this type, the chorionic villi are grouped into distinct, button-like structures called cotyledons.
These cotyledons associate with maternal caruncles on the uterine wall to form placentomes.
This is characteristic of ruminants likecows,sheep, and goats. Thus, (C) matches with (I).
(D). Discoid Placenta: Here, the chorionic villi are concentrated in a single, disc-shaped area on the chorion.
This is characteristic of primates, includingmonkeys andhumans. Thus, (D) matches with (III).
Combining these matches, we obtain: (A) - (II), (B) - (IV), (C) - (I), (D) - (III).
Step 3: Final Answer:
The correct option is (A).
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