what makes them different?

they give birth to young that can function independently and that were nourished by the placenta.

the length of the baby being in the womb is known as the what period?

gestation period, it's longer for placental mammals vs. marsupials

how are the groups organized?

they;re organized by how the move, what they eat or where they live

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madeline freeman Q4

mmf Q4 animals chordates- mammals-- placental

Question	Answer
how many species?	diverse, 4,000 species
what makes them different?	they give birth to young that can function independently and that were nourished by the placenta.
the length of the baby being in the womb is known as the what period?	gestation period, it's longer for placental mammals vs. marsupials
how are the groups organized?	they;re organized by how the move, what they eat or where they live
what are the ten groups?	1. insect eating- moles