Mammary glands are present in?
Correct answer: A. All of these
- A. All of these
- B. Eutheria
- C. Metatheria
- D. Prototheria
Explanation
All these classes of mammals have mammary glands through which they nourish their young ones. Prototheria are egg-laying mammals, Metatheria are marsupials that give birth to partially developed young ones and Eutheria are placental mammals that give birth to fully developed young ones.
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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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