Adaptations of Seed Plants

are named so because their seeds are not contained in a fruit.

Gymnosperms (naked seeds)

have reproductive structures called flowers and fruit in which the seeds develop and are the largest group of plants.

Angiosperms (Vessel seeds)

All seed plants are ________, meaning that they have two different types of sporangia that produce two types of spores

heterospores

_______ that produce ______, which gives rise to the female gametophytes.

mega sporangia, megaspores

_______ that produces ______, which give rise to the male gametophytes

microsporangia, microspores

Layers of tissue called ______ surround that megasporangium

integuments

The integuments, megasporangium, and megaspore form a structure called an

ovule

Microsporangia produce microspores that develop into

pollen grains

The transfer of pollen to the ovule is called

pollination