Chapter 29 Notes (Primitive Land Plants)

Chapter 29 Notes (Primitive Land Plants) - Chapter 29 Notes...

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Chapter 29 Notes (Primitive Land Plants) 1. Adaptations to the land a. Apical meristems – the elongation of the roots b. Alternations of generation (sporophytes and gametophytes – it will be discussed later.) c. Walled spores produced in sporangia d. Multicellular gametangia 2. The evolution of plants - Seedless Nonvascular Plants → Seedless Vascular Plants → Seed Vascular Plants (Two types: Seeds are inside or outside) a. Phylum Bryophyta (Seedless Nonvascular Plants) - mosses i. Very primitive level of plants ii. Basic structures of plants barely exist – even roots and leaves are primitive. iii. Gametophyte is dominant (bigger) over sporophyte. * Gametophyte produces gametes while sporophyte produces spores. iv. Life cycle - Summary . Spores (n) → Female Gametophyte (n) – Archegonia (eggs) → Fertilization Male Gametophyte (n) – Antheridia (sperms) ↖ ↘ raindrop Meiosis ← Mature sporophyte (2n) ← Young sporophyte ← Zygote (2n)
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Chapter 29 Notes (Primitive Land Plants) - Chapter 29 Notes...

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