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Quick algae review

Quick algae review. Habitat Structure Type of cell Transport Reproduction. MOSSES and FERNS Seedless Plants - Chapter 21. According to The Theory of Evolution: Life (algae) began in the sea, and for millions of years living things remained in the sea. Yet, slowly, life emerged onto land.

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Quick algae review

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  1. Quick algae review • Habitat • Structure • Type of cell • Transport • Reproduction

  2. MOSSES and FERNSSeedless Plants - Chapter 21

  3. According to The Theory of Evolution: Life (algae) began in the sea, and for millions of years living things remained in the sea. Yet, slowly, life emerged onto land. The first land plants have to meet the challenges of living on dry land. Let’s take a look at how they did it.

  4. Progression 450-500mya Algae (aquatic plants) Algae-like Land plants Bryophyte -mosses -liverworts -hornworts Tracheophyte -ferns -higher plants These organisms have to face up to the challenges of living on dry land.

  5. What are some challenges tolife on land? • Drying out • Food • Diffusion of O2 and CO2 • Successful reproduction

  6. Adapting to Life on Land • have a constant supply of water to cells • be exposed to make food and thus need rigid support to hold up their leaves. • be able to transport nutrients & water throughout the plant - vascular tissue + rhizoids food water

  7. 4. Must be able to exchange O2 & CO2 w/o losing too much H2O 5. Be able to reproduce without water - small spores, flagellated sperms Mature moss capsule Moss capsules

  8. Phylum Bryophyta:Moss, Liverworts, Hornworts Leptostomum inclinans Papillaria crocea Polytrichum juniperinum Bryum argenteum

  9. Chinese Club Moss

  10. Stop here • Homework read p. 449-451 • Questions 1-3

  11. How Do Bryophytes Get Water? Problem: Non-vascular plant 1. Via osmosis and capillary action 2. Leaves have only one or two cells 3. Only about 2 to 5 cm tall, cling to damp soil, sheltered rocks, and the shady side of trees 4. Rhizoids:root-like structures; mostly for anchor

  12. Critical Thinking • Your friend finds a small plant growing in the desert. He identifies the plant as a moss. Explain why this plant is probably not a moss. • Don’t think out loud please.

  13. Structure of Moss • Please find an empty spot on your handout. =)

  14. Life Cycle of Mosses • Alternation of generations: process of switching from asexual (haploid) to sexual reproduction (diploid)

  15. Alternation of Generation in Mosses • Germinate– develop into a plant • Protonema– transitory stage of moss plant • Archegonium– female organ – egg develops here - Protects gametes

  16. Antheridium - male organ - sperm develops here • Protects gametes

  17. Refer to handout on moss reproduction

  18. Your task for the rest of the class. • Create a placemat and make sure you cover these topics: • Phylum • Adaptation to life on land (5 points) • Where they are found • Type of reproduction • Appearance (description + diagram) • Diagram • Physical features (6 points) Out of 22marks

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