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Mammals are divided into three groups base on reproduction. What are the three following groups and what are there traits?
1. Monotremes - The most primitive type of a living mammal. They lay eggs and have a single opening for reproduction and elimination of wastes. The females have no teats, but provide milk directly through the skin to their young.
2. Marsupials - Mammals that give birth to relatively undeveloped young who still continues to develope outside of their mother's body attached to one of her nipples. Most of thse mammals have longer hindlegs than forelimbs, and the females usually pouches in which they carry their young.
3. Placental - The corresponding organ or part in certain mammals.
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Are mammals divided into sub groups?
Yes, mammals are divided into many sub-groups.
Do all mammals have placenta?
no they do not. Mammals are divided into three groups; monotremes, marsupials, and placental mammals.
Why are vertebrates divided?
Vertebrates are divided into 5 groups to put similar organisms together. The groups are mammals, amphibians, reptiles, fishes and birds. Mammals and birds are warm-blooded while reptiles, fishes and amphibians are cold-blooded.
How are resources divided?
these r divided in to following groups: individual groups: these are owned by the individuals examples are houses ,land owned by a person village or a city
What are the three separate groups of mammals according to reproduction?
monotreme= lay eggs marsupials= pouches placental= giving normal birth, like humans
Do humans have a placenta?
no they do not. Mammals are divided into three groups; monotremes, marsupials, and placental mammals.
What are the mammals groups?
mice
What are the two groups of vertebrates?
There are five groups of vertebrates; fish, amphibians, reptiles, birds and mammals.
What vertebrate group has three major groups egg-laying pouched and placental?
Mammals has these 3 groups .
Mammals and lizards or birds are the two groups of vertebrates that are endotherms?
Mammals and birds are endothermic.
Why do mammals feedi herds or groups?
for saftey
What are in groups?
Dolphins are mammals, specifically they are cetaceans.
