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3 Cards in this Set

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  • Back

Provide example genera of partially/fully aquatic ferns.

Azolla and marsilea

In what era did seedless vascular plants reach their greatest abundance and diversity?

Greatest abundance between the Devonian period and the carboniferous period in the Paleozoic era.

What is a seed? What is an ovule?

A seed is a mature ovule. An ovule is a megasporangium, a single functional megaspore which becomes a female gametophyte, with protective tissue called integument.