Placental mammals develop their offspring inside the _____________.

The placenta is an organ that develops in a pregnant female.

Food, oxygen and nutrients pass through the placenta to the offspring.

The offspring passes ___________through the placenta back to the mother.

The ____________________connects the placenta to the offspring.

Placental mammals are classified as to how they eat and how they_____________.

Whales, dolphins and porpoises are adapted for swimming.

Sea mammals do need or do not need oxygen to breathe.

The carnivore group of mammals , such as large cats, otters, and possibly seals, are all___________________.

Primates, that include, monkeys, apes and humans all have ____________brains and eyes that face forward.

The gestational period refers to the time it takes the mammal to give life to their offspring.

Elephants are the largest___________mammals.

Elephants carry their unborn offspring the longest of all mammals. She carries her offspring about ________________.

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