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Questions and Answers
Which of the following statements accurately describes the evolutionary relationship between plants and fungi?
Which of the following statements accurately describes the evolutionary relationship between plants and fungi?
What is the primary reason why protists are considered para/polyphyletic?
What is the primary reason why protists are considered para/polyphyletic?
Which of the following characteristics is NOT shared by both plants and fungi?
Which of the following characteristics is NOT shared by both plants and fungi?
Based on the information presented, which of the following statements best describes the evolution of multicellularity?
Based on the information presented, which of the following statements best describes the evolution of multicellularity?
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Which of the following statements accurately describes the relationship between fungi and plants?
Which of the following statements accurately describes the relationship between fungi and plants?
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What is a key adaptation that allowed gymnosperms and angiosperms to thrive on land?
What is a key adaptation that allowed gymnosperms and angiosperms to thrive on land?
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Which of the following is NOT a key adaptation of angiosperms?
Which of the following is NOT a key adaptation of angiosperms?
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What challenges did early land plants face in adapting to a terrestrial environment?
What challenges did early land plants face in adapting to a terrestrial environment?
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What is the main benefit for plants that form symbiotic relationships with animals?
What is the main benefit for plants that form symbiotic relationships with animals?
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Which of the following is NOT a characteristic of tannins?
Which of the following is NOT a characteristic of tannins?
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What is the common characteristic of terpenes?
What is the common characteristic of terpenes?
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Which of the following compounds is NOT a terpene?
Which of the following compounds is NOT a terpene?
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What is the significance of the 'blue' effect in distant landscapes?
What is the significance of the 'blue' effect in distant landscapes?
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What is the main difference between gymnosperms and angiosperms?
What is the main difference between gymnosperms and angiosperms?
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Which of the following is NOT a characteristic commonly shared by seed plants?
Which of the following is NOT a characteristic commonly shared by seed plants?
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What is the primary benefit of the seed in seed plants?
What is the primary benefit of the seed in seed plants?
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What is one primary benefit of seeds for plants?
What is one primary benefit of seeds for plants?
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Which compound is responsible for the 'smoky' effect in the Smoky Mountains?
Which compound is responsible for the 'smoky' effect in the Smoky Mountains?
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Which of the following is NOT true about gymnosperms?
Which of the following is NOT true about gymnosperms?
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What is the main role of the flower in angiosperms?
What is the main role of the flower in angiosperms?
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Which of the following is a characteristic shared by both gymnosperms and angiosperms?
Which of the following is a characteristic shared by both gymnosperms and angiosperms?
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How do angiosperms differ from gymnosperms?
How do angiosperms differ from gymnosperms?
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What is the significance of heterospory in the evolution of seed plants?
What is the significance of heterospory in the evolution of seed plants?
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Which of the following is TRUE regarding the evolution of angiosperms?
Which of the following is TRUE regarding the evolution of angiosperms?
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The reduced gametophyte stage in seed plants is an adaptation that provides a distinct advantage. Which of the following best describes this advantage?
The reduced gametophyte stage in seed plants is an adaptation that provides a distinct advantage. Which of the following best describes this advantage?
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Which group of fungi is known to be a basal fungal lineage?
Which group of fungi is known to be a basal fungal lineage?
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Which of these is NOT a characteristic of a fungus?
Which of these is NOT a characteristic of a fungus?
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Which fungal group is characterized by the production of saclike asci?
Which fungal group is characterized by the production of saclike asci?
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What type of symbiotic relationship is exemplified by the association between fungi and plants in mycorrhizae?
What type of symbiotic relationship is exemplified by the association between fungi and plants in mycorrhizae?
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What type of fungus is implicated in the global decline of amphibian populations?
What type of fungus is implicated in the global decline of amphibian populations?
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What is the name given to the large fungal structure that can be found in the Honey Fungus (Armillaria ostoyae)?
What is the name given to the large fungal structure that can be found in the Honey Fungus (Armillaria ostoyae)?
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What is a major consequence of using fungicides in modern agricultural practices?
What is a major consequence of using fungicides in modern agricultural practices?
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Which of the following statements is TRUE about the relationship between ants and fungi in the text?
Which of the following statements is TRUE about the relationship between ants and fungi in the text?
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What is a key role of fungi in ecosystems?
What is a key role of fungi in ecosystems?
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What adaptation allows gymnosperms and angiosperms to thrive in a terrestrial environment?
What adaptation allows gymnosperms and angiosperms to thrive in a terrestrial environment?
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How do mycorrhizal fungi benefit plants?
How do mycorrhizal fungi benefit plants?
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Angiosperms utilize a process called double fertilization. What is the purpose of double fertilization?
Angiosperms utilize a process called double fertilization. What is the purpose of double fertilization?
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How do some angiosperms avoid self-fertilization?
How do some angiosperms avoid self-fertilization?
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What is the primary way that fungi obtain nutrients?
What is the primary way that fungi obtain nutrients?
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Lichens are a fascinating example of symbiosis. What two organisms are involved in this symbiotic relationship?
Lichens are a fascinating example of symbiosis. What two organisms are involved in this symbiotic relationship?
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Flashcards
Characteristics of Fungi
Characteristics of Fungi
Fungi are eukaryotic organisms, often decomposers, that reproduce via spores.
Multicellularity
Multicellularity
Multicellularity evolved multiple times in eukaryotic lineages, leading to diverse life forms.
Importance of Fungi in Ecosystems
Importance of Fungi in Ecosystems
Fungi play crucial roles as decomposers, nutrient recyclers, and symbiotic partners.
Eukaryotic Domain
Eukaryotic Domain
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Convergent Evolution
Convergent Evolution
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What are fungi?
What are fungi?
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Importance of mycorrhizal fungi
Importance of mycorrhizal fungi
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Land plants origins
Land plants origins
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Key adaptations of gymnosperms and angiosperms
Key adaptations of gymnosperms and angiosperms
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Adaptations of angiosperms
Adaptations of angiosperms
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Alkaloids
Alkaloids
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Tannins
Tannins
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Terpenes
Terpenes
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Flavonoids
Flavonoids
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Gymnosperms
Gymnosperms
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Angiosperms
Angiosperms
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Gametophyte
Gametophyte
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Sporophyte
Sporophyte
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Crenarcheotes
Crenarcheotes
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Mycete
Mycete
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Ascomycetes
Ascomycetes
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Basidiomycetes
Basidiomycetes
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Chytrid fungi
Chytrid fungi
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Leaf-Cutter Ants
Leaf-Cutter Ants
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Mycorrhizae
Mycorrhizae
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Fungicide treatments
Fungicide treatments
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Lichens
Lichens
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Fungi
Fungi
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Fungus-Animal Symbiosis
Fungus-Animal Symbiosis
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Mycorrhizal Fungi
Mycorrhizal Fungi
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Green Algae
Green Algae
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Key Adaptations of Angiosperms
Key Adaptations of Angiosperms
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Seed Dispersal
Seed Dispersal
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Animal Symbiosis
Animal Symbiosis
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Heterospory
Heterospory
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Reduced Gametophytes
Reduced Gametophytes
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Homosporous
Homosporous
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Ovules
Ovules
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Pollen
Pollen
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Seed Advantages
Seed Advantages
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Study Notes
Unit 1: Evolution and Biodiversity
- Unit covers evolution, phylogenetic trees, evolution of populations, origin of species, history of life, and biodiversity of bacteria, archaea, protists, fungi, and plants.
Diversity of Life: Plants & Fungi
- Images of diverse plants and fungi are shown, highlighting the variety of life forms.
Plants and Fungi
- Fungi are heterotrophs, not plants, and absorb nutrients.
- Fungi exhibit diverse lineages, play roles in nutrient cycling, and interactions with humans.
- Mycorrhizae are symbiotic relationships between fungi and plants that are beneficial to both.
- Land plants evolved from green algae and adapted to terrestrial environments facing challenges like gravity, environmental fluctuations, and water availability.
- Seeds and pollen are adaptations for land plants.
- Key adaptations of flowering plants include flowers, fruits, and double fertilization.
- Angiosperms exhibit symbiotic relationships with animals for pollination and dispersal.
Synopsis for today
- Focus on the characteristics of fungi and plants.
- Key roles of fungi and plants in ecosystems.
- The relationship between humans and plants and fungi.
- Specific chapters to focus on (numbers included).
The Origin of Multicellularity
- Eukaryotic cell evolution led to a range of unicellular forms.
- Multicellularity evolved multiple times within various eukaryotic lineages.
- Convergent evolution of multicellularity is the likely reason for protist diversity.
Today's Focus: Plants & Fungi
- Both plants and fungi are eukaryotes.
- The relationship between plants and fungi versus fungi and animals.
- Protists' placement in the phylogeny is presented.
- Green algae are the closest relatives of plants, and share traits.
- Plants evolved from a common ancestor with modern green algae, but from a separate lineage.
- The transition from aquatic to terrestrial environments for plants is highlighted.
Why should you care about plants?
- Plants form the base of terrestrial food webs.
- Agriculture heavily depends on plants, particularly seed plants.
- The invention of agriculture was a major cultural shift.
Why Are Plants Important?
- Plants are abundant and complex living organisms.
- Plants produce oxygen as a byproduct of photosynthesis, a critical process for land animals.
- They are a significant source of medicines and recreational substances (e.g., caffeine).
- Plants absorb CO2 and some concentrate heavy metals.
- They are a source of fabrics, textiles, paper, and plastics (polymers).
- Plant diversity needs to be preserved.
Fighting "Plant awareness disparity"
- Humans strongly rely on plants for oxygen, medicine, food, shelter, and clothing.
- Many plant species face extinction despite holding undiscovered medicinal potential.
Advantages to moving onto land
- Fewer herbivores, parasites, and competitors.
- Increased sunlight and CO2
- Rich in mineral nutrients.
Challenges of moving onto land
- The challenges of gravity, water scarcity, and environmental fluctuations
- Key adaptations evolved in land plants, in contrast to charophyte algae, to facilitate their success.
Land Plants
- Origin of land plants (approximately 470 million years ago).
- Origin of vascular plants (approximately 425 million years ago).
- Origin of seed plants (approximately 360 million years ago).
- Distinctions between nonvascular, vascular seedless, and seed plants are highlighted.
- Bryophytes, seedless vascular plants, and seed plants (gymnosperms and angiosperms) exhibit differences regarding their evolutionary history and biological features.
- Phylogenetic relationships among different plant lineages are illustrated.
Life on Land
Sporopellenin provides a durable coating, preventing zygote dehydration in land plants (similar to modern plant spore casings).
- Benefits of land include sunlight, CO2, soil nutrients, and fewer herbivores or pathogens.
- Initial challenges for plants on land are the lack of structural support against gravity and the arid nature of terrestrial environments.
Derived Traits of Land Plants: #1
- Alternation of generations – alternation between two multicellular generations (gametophyte and sporophyte) with specific mechanisms for spore and gamete development.
Derived Traits of Land Plants: #2
- Multicellular dependent embryos – embryos depend on the parent for nutrients. The parent plant provides nutrients to the embryo through placental transfer cells..
Derived Traits of Land Plants: #3
- Spore walls produce sporopollenin which enhance survival under harsh environments
Derived Traits of Land Plants: #4
- Multicellular gametangia (protect gametes in harsh environments)
Derived Traits of Land Plants: #5
- Apical meristems enable continual growth in length, with apical meristem cells differentiating into various tissues.
Additional Derived Traits of Land Plants
- Cuticle – waxy covering of epidermis that reduces water loss for terrestrial plants
- Stomata – specialized pores allowing for gas exchange (CO2 absorption & O2 release) in plants that remain on land.
- Mycorrhizae – symbiotic partnerships between fungi and plant roots, assisting with nutrient acquisition in land plants.
- Secondary Compounds – to defend against herbivores, pests, and pathogens
Additional Derived Traits of (some) Land Plants
- Plant vascular tissues (xylem and phloem) enable plants to get taller, as xylem conducts water and supporting structures, while phloem conducts organic nutrients.
Secondary Compounds
- Different categories of secondary compounds are shown, along with examples, covering their roles in defense and other ecological functions.
Terpenes/Terpenoids
- Major group of secondary metabolites.
- Variations on isoprene form hydrocarbons.
- They likely provide the 'smoky' or 'blue' odor/appearance.
Gametophyte-sporophyte relationships
- Relationships between the gametophyte and sporophyte in different plant groups (mosses, ferns, and seed plants).
- Similarities and differences in the reproductive cycles among plant types are explained.
Evolution of Seed Plants
- Seeds provide dispersal capabilities.
- Structure and function of ovules and pollen compared between gymnosperms and angiosperms.
Shared Characteristics of Seed Plants
- Reduced gametophytes and heterospory mechanisms.
- Ovules and egg production and the role of the protective integument in seeds.
- Pollen and sperm production, allowing for plant dispersal in land.
Gymnosperms
- Seeds are naked, not enclosed.
- Sporophylls produce cones.
- Includes conifers (pine, fir, and redwood).
Angiosperms
- Seeds enclosed in fruits.
- Exhibit flowers.
- Includes tomatoes, nectarines, milkweed, and hazelnuts.
- Pollination by animals (insects, birds).
Products from Seed Plants
- Angiosperms provide a significant source of human food.
- Plants are vital for various applications like beverages and medications.
Threats to Plant Biodiversity
- Deforestation (destruction of plant habitats).
- Invasive species (herbivores and pathogens that disrupt plant communities).
Review & practice
- Review the generalized plant life cycle and how it differs across different plants.
- List key adaptations of land plants, vascular plants, and seed plants to their terrestrial environments.
Fungi
- Fungi are eukaryotes that decompose organic matter (nutrient recycling), crucial for terrestrial ecosystems.
- Fungi are heterotrophs, absorbing nutrients.
- Most have chitin in their cell walls, which are needed for strength.
- Fungi reproduce using spores, and some consist of parasitic and mutualistic species.
Fungi Body Structure
- Hyphae – are the absorptive structures
- Mycelium – a network of hyphae
- Reproductive structures generate haploid spores.
Hyphae: Trapping & killing prey
- Fungi use hyphae to trap and digest nematodes.
- Specific hyphae, haustoria, extend to extract nutrients from host cells.
Fungi
- Single-celled fungi, like yeast, are common in bread and beer production.
- Rhizospordosis, a fungal infection in tissue, features sporangia.
Fungal Disease Examples
- Examples of fungi and their impact on plants and animals.
- Corn smut, tar spot, and ergot are fungal diseases affecting plants.
Reproduction
- Asexual reproduction in fungi: spores are generated and grow into new hyphae.
- Sexual reproduction in fungi: involves different stages like plasmogamy, karyogamy, and meiosis.
Fungi Phylogeny
- Fungi are closely related to unicellular nucleariids.
- Animal evolution is closely related to unicellular choanoflagellates.
- Phyla (divisions) are used to classify fungi (approx. 1.5 million species, with 100,000+ previously classified as protists).
Select fungal groups
- Cryptomycetes and Microsporidians (basal fungal lineages).
- Zoopagomycetes (fungi that parasitize insects).
- Ascomycetes (sac fungi, with asci spores).
- Basidiomycetes (mushrooms, puffballs, and shelf fungi).
Chytrid fungi
- A group of fungi that infects amphibians, resulting in significant amphibian declines.
- Chytrid fungus causes mycosis, harming amphibian skin.
Amazing Fungi
- Fairy ring fungi (mycelia grows at 30 cm /year) with reproductive structures manifesting within hours.
- Honey fungi (Armillaria ostoyae) with a huge area (football fields) and advanced age.
Fungi Are Important Symbionts
- Mycorrhizae – plant symbionts supporting nutrient acquisition.
- Traditional agricultural practices (e.g., fungicides) disrupted mycorrhizae, leading farmers to rely more on fertilizers.
- Excess fertilizers negatively impact the environment.
Fungus-Animal Symbiosis
- Fungi and animals evolved in symbiosis.
- Insecticides and fungicides could negatively affect the relationship between ants and fungi.
Lichens
- Symbiosis between fungi and photosynthetic organisms (algae or cyanobacteria) is presented; these organisms benefit from this partnership.
- They break down surfaces chemically and physically.
- Some lichens perform nitrogen fixation, adding it to ecosystems.
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Description
Test your knowledge on the evolutionary relationships between plants, fungi, and protists. This quiz covers key adaptations of plants and the significance of their interactions with animals and the environment. Challenge yourself with questions about multicellularity and plant characteristics.