Plants With or Without Seeds E.Q: What adaptation allows pteridophytes to grow larger than bryophytes? What are the 3 main parts of a seed?

Plants Without Seeds: Nonvascular Bryophytes: Nonvascular plants because they lack a lignin hardened vascular tissue. Mosses Hornworts Liverworts

Plants Without Seeds: Vascular Pteridophytes: have lignin hardened support tissue. Transports food and water. Ferns: Over 12,000 species Club Mosses: Common on forest floors Horsetails: very few species on earth

Seed Plants Seed plants have 2 characteristics: They have vascular tissue They use pollen and seeds to reproduce Pollen Grain: contains male gametophyte (sperm cells) Ovule: contains female gametophyte (egg cells) forms seed after fertilization.

Seed Plants Parts of a Seed A seed has 3 main parts: Embryo: young plant that develops from fertilized egg. Stored Food: seed leaves that store food (cotyledons) Seed Coat: Protects seed

Seed Germination Germination: Development into a plant Occurs when embryo begins to grow and pushes out seed Scattering of seeds is done by other organisms, water, or wind

2 Groups of Seed Plants Gymnosperms – Plants who seeds are not protected by fruit. Angiosperms – Plants that produce seeds protected by fruit.