University:
Bradley University
Course:
BIO 314 | Plant Development
Academic year:

2018
Views:

55

Pages:

3
Author:

Angelica Rose

5/15/2018 Gymnosperms 2 Gymnosperms are the non-flowering seed plants. What do they have in common? Naked seeds (“gymno” and “sperm”) Most have needle or scale leaves Deep roots Naked seed 1 3 4 Leaves Cones Comparison Cones are like fruits. They contain the seeds. But there are also male cones that just produce pollen. Male cones: Needle leaves (gymnosperm) broad leaves (angiosperm) 5 6 Angiosperms The flowering plants have two important characteristics: They have flowers They produce fruit (to cover seed) 1 5/15/2018 7 8 Seeds There are hundreds of thousands of plant species worldwide Therefore, there are many different types of seeds. But... Plant without Seeds There are several types of plants without seeds The nonvascular plants Some vascular plants 9 10 Nonvascular plants Mosses! ….and liverworts and hornworts. Moss is everywhere and you’ll probably never notice liverworts or hornworts. Vascular Plants w/o seeds Old timey plants …and horsetails and club mossess... Ferns! Moss Tree fern 11 12 Seed plants Seed plants The most diverse and interesting plants are seed plants 2 groups: 1. Angiosperms – Flowering Plants 2. Gymnosperms – Not the flowering plants Flowering plant Important characteristics 1. Vascular plants 2. Use pollen and seeds for reproduction Pollen Fruit (seeds inside) Gymnosperm cone 2 5/15/2018 13 14 Vascular Tissue Vascular Tissue Phloem – tubes that transport food throughout plant Xylem – tubes that pull water and minerals upward from the roots 15 Vascular tissue: Phloem and Xylem Cambium: Active layer that causes tree to keep growing Seed Structure Pollen and seeds Pollen: male gametophyte that produces sperm Pollination: Sperms meets egg and seed develops The seed houses the embryo (baby plant). seed also contains one or more cotyledons (seed leaves). Use: The Fruit (seeds inside) Pollen 16 Food storage Make food Identification 17 Life Cycle 3

Plants Notes 8.4 and 8.5

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