Ch 29 Plant Diversity I Flashcards
How do plants enable othet life forms to survive on land? (3)
- Supply O2
- Most food eaten by terrestrial animals
- Roots create habitats by stabilizing soil
What is the closest living organisms of land plants?
Green Algae
- Kingdom Chlorophyta
What Domain and Kingdom deals with Lower Plant Phyla?
- Domain Eukarya
- Kingdom Plantae
Morphological & Molecular Evidence
What do land plants and green algae share?
- Rings of cellulose-synthesizing
- Structure of flagellated sperm (cuz aquatic)
- Phragmoplasts (group of microtubules, form cell plate during cytokinesis)
Morphological & Molecular Evidence
What do land plants and green algae share?
- Rings of cellulose-synthesizing
- Structure of flagellated sperm (cuz aquatic)
- Phragmoplasts (group of microtubules, form cell plate during cytokinesis)
What are 5 adaptations that facilitated the Colonization of Land?
- Alternation of Generations
- Multicellular, Dependent Embryos
- Walled Spores Produced in Sporangia
- Multicellular Gametangia
- Apical Meristems
What does Alternation of Generations do?
They alternate b/w Multicellular Haploid (n) Gametophyte and a Multicellular Diploid (2n) sporophyte
What do Multicellular, Dependent Embryos do, and what are their functions?
Develop from zygote that retain tissues of female parent (Gametophyte)
- Protects Embryos from harsh environ conditions
- Provides nutrients (sugars + AA)
What do “Walled Spores Produced in Sporangia” do?
- Tough & resistant to harsh environ (material = sporopollenin)
- Multicellular Sporangia that produces Spores (sporocytes)
What do diploid cells (sporocytes) undergo and generate
Undergo Meiosis
Generate Haploid Spores
What do Multicellular Gametangia do?
Production of gametes w/in Multicellular organs called Gametangia
What is the name of the female gametangia and what do they do?
Name= archegonia
It’s a pear shape structure that produces a single non-motile (non-moving) egg retaining w/in the bulbous part of the organ
What is the name of a male gametangia and what do they do?
Name= antheridia
Produce sperms and release them into environ
