Placenta develops in the embryonic stage in which mammals?
Correct answer: A. Eutherian
- A. Eutherian
- B. Metatheria
- C. All mammals
- D. Protheria
Explanation
In eutherians, embryo complete its embryonic development in the uterus. The placenta develops during pregnancy which serves as a connection between the mother and the fetus. Eutherians have a longer period of pregnancy as compared to metatherians. They are viviparous.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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