Fill in the table “Comparative characteristics of first animals, lower (marsupials) and higher (placental) animals”
| October 30, 2020 | Education
| Stage name | First Beast | Lesser beasts (marsupials) | Higher beasts (placental) |
| The presence of a cloaca | Yes | No | No |
| Consistency of body temperature | No | Weak | Yes |
| Features of the structure of oocytes | Large | Smaller | Smaller |
| The presence of a uterus | No | Yes | Yes |
| The presence of a placenta | No | No | Yes |
| Features of the mammary glands | There are no nipples, there are ducts | 1 nipple in a bag | have nipples |
| Laying eggs or live birth | Laying eggs | Viviparity | Viviparity |
| The degree of development of the cubs after their appearance | Naked and blind cubs | Small, underdeveloped | Developed |
| Place of development of cubs after their appearance | In the burrow of the platypus, the bag of the echidna | In the bag | In the environment |
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