Chlorophyll is what makes these algae—and most of the plants that we are familiar with—green.

Most green algae also have cell walls that contain cellulose

Natural selection did not favored individuals that could withstand longer dry periods

What category of plants evolved most recently?

Plants will die if they dry out from exposure to air and sunlight.

Without it, the movement of air would be prevented by the cuticle

A vascular system allows a plant to grow higher off the ground

Is also responsible for the strength of wood and provides stiffness to the stems of other plants.

Live in damp environments and get moisture directly from the surface of the soil.

Are the most common nonvascular plants.

Are modern seedless vascular plants.

Pollination occurs when pollen meets female reproductive parts of the same plant species.

A gymnosperm is a seed plant whose seeds are not enclosed in fruit.

An angiosperm is a seed plant that has seeds enclosed in some type of fruit.

A fruit is the mature ovary of a flower.

Is an embryonic leaf inside a seed

Flowering plants that mature from seeds, produce flowers, and die all in one year