Mammal with true placenta? a) kangaroo b) echidna c)platypus d)mongoos...
Mongoose is the mammal which has a true placenta. The placenta is the characteristic feature of mammals. It aids in exchange of nutrients and wastes between the mother and the foetus. It is present in all mammals except marsupials and monotremes.
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Mammal with true placenta? a) kangaroo b) echidna c)platypus d)mongoos...
Explanation:
Mammal with True Placenta:
The correct answer to the question is D, mongoose. This is because a mongoose is a mammal that possesses a true placenta.
Placenta:
- The placenta is an organ that develops in the uterus during pregnancy.
- It allows for the exchange of nutrients, gases, and waste products between the mother and the developing fetus.
Types of Mammals:
- There are three main types of mammals based on their reproduction methods: monotremes, marsupials, and placental mammals.
- Monotremes, like the echidna and platypus, lay eggs and do not have a true placenta.
- Marsupials, like the kangaroo, give birth to relatively undeveloped young that continue to develop in a pouch.
- Placental mammals, like the mongoose, have a true placenta that nourishes the fetus during pregnancy.
Logic Behind the Question:
- The question tests the knowledge of the different reproductive strategies of mammals.
- By knowing the characteristics of each type of mammal, one can determine which group a particular species belongs to based on specific traits like the presence or absence of a true placenta.
In conclusion, the question about mammals with a true placenta is based on understanding the reproductive strategies of different mammal groups. Knowing the unique features of each type of mammal allows one to correctly identify which species possess a true placenta, like the mongoose.
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