Plant and Fungi Evolution Quiz
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Questions and Answers

Which of the following statements accurately describes the evolutionary relationship between plants and fungi?

  • Plants and fungi are more closely related to each other than to animals.
  • Plants and fungi evolved multicellularity independently from each other. (correct)
  • Animals are more closely related to plants than fungi.
  • Plants and fungi are both directly descended from a common ancestor of the protists.
  • What is the primary reason why protists are considered para/polyphyletic?

  • Protists are all single-celled organisms, with no multicellular forms.
  • Protists have evolved independently multiple times from different ancestral lineages. (correct)
  • Protists all descended from a single common ancestor, but have diversified greatly.
  • Protists are a diverse group with no defining characteristics that unite them.
  • Which of the following characteristics is NOT shared by both plants and fungi?

  • Heterotrophic metabolism
  • Autotrophic metabolism (correct)
  • Multicellularity
  • Eukaryotic cell structure
  • Based on the information presented, which of the following statements best describes the evolution of multicellularity?

    <p>Multicellularity evolved independently multiple times in different lineages of eukaryotes. (D)</p> Signup and view all the answers

    Which of the following statements accurately describes the relationship between fungi and plants?

    <p>Plants and fungi are symbiotic organisms that exhibit mutualism, both benefiting from the relationship. (C), Fungi and plants are separate kingdoms that evolved from different ancestors, but they share a common ancestor with green algae. (G)</p> Signup and view all the answers

    What is a key adaptation that allowed gymnosperms and angiosperms to thrive on land?

    <p>The presence of seeds and pollen, which protect and disperse offspring. (G)</p> Signup and view all the answers

    Which of the following is NOT a key adaptation of angiosperms?

    <p>Ability to reproduce asexually, promoting genetic diversity. (H)</p> Signup and view all the answers

    What challenges did early land plants face in adapting to a terrestrial environment?

    <p>Limited availability of nutrients and water. (A), The need for specialized structures to protect gametes from desiccation. (C), Fluctuating environmental conditions, such as temperature and humidity. (D), The force of gravity acting on their structure. (E), Increased exposure to UV radiation. (G)</p> Signup and view all the answers

    What is the main benefit for plants that form symbiotic relationships with animals?

    <p>Increased reproductive success through pollination and seed dispersal. (E)</p> Signup and view all the answers

    Which of the following is NOT a characteristic of tannins?

    <p>They are primarily found in the roots of plants. (B)</p> Signup and view all the answers

    What is the common characteristic of terpenes?

    <p>They have a strong smell. (B)</p> Signup and view all the answers

    Which of the following compounds is NOT a terpene?

    <p>Cinnamon (A)</p> Signup and view all the answers

    What is the significance of the 'blue' effect in distant landscapes?

    <p>It is due to the scattering of light by molecules in the air. (A)</p> Signup and view all the answers

    What is the main difference between gymnosperms and angiosperms?

    <p>Gymnosperms have naked seeds, while angiosperms have seeds enclosed in fruits. (C)</p> Signup and view all the answers

    Which of the following is NOT a characteristic commonly shared by seed plants?

    <p>They produce flowers. (A)</p> Signup and view all the answers

    What is the primary benefit of the seed in seed plants?

    <p>Allows for long-distance dispersal and long-term dormancy. (D)</p> Signup and view all the answers

    What is one primary benefit of seeds for plants?

    <p>Seeds provide a protective barrier for the developing embryo. (C)</p> Signup and view all the answers

    Which compound is responsible for the 'smoky' effect in the Smoky Mountains?

    <p>Terpenes (B)</p> Signup and view all the answers

    Which of the following is NOT true about gymnosperms?

    <p>They have a dominant gametophyte generation. (A)</p> Signup and view all the answers

    What is the main role of the flower in angiosperms?

    <p>To attract pollinators and facilitate sexual reproduction. (B)</p> Signup and view all the answers

    Which of the following is a characteristic shared by both gymnosperms and angiosperms?

    <p>They produce seeds. (D)</p> Signup and view all the answers

    How do angiosperms differ from gymnosperms?

    <p>Angiosperms produce flowers and fruits, while gymnosperms produce cones. (C)</p> Signup and view all the answers

    What is the significance of heterospory in the evolution of seed plants?

    <p>It leads to the development of distinct male and female gametophytes. (E)</p> Signup and view all the answers

    Which of the following is TRUE regarding the evolution of angiosperms?

    <p>The evolution of angiosperms was significantly influenced by pollinators and herbivores. (C)</p> Signup and view all the answers

    The reduced gametophyte stage in seed plants is an adaptation that provides a distinct advantage. Which of the following best describes this advantage?

    <p>Reduced gametophytes allow for a less dependent relationship on water for fertilization. (D)</p> Signup and view all the answers

    Which group of fungi is known to be a basal fungal lineage?

    <p>Cryptomycetes (C)</p> Signup and view all the answers

    Which of these is NOT a characteristic of a fungus?

    <p>They are autotrophic (D)</p> Signup and view all the answers

    Which fungal group is characterized by the production of saclike asci?

    <p>Ascomycetes (B)</p> Signup and view all the answers

    What type of symbiotic relationship is exemplified by the association between fungi and plants in mycorrhizae?

    <p>Mutualism (C)</p> Signup and view all the answers

    What type of fungus is implicated in the global decline of amphibian populations?

    <p>Chytrid fungi (B)</p> Signup and view all the answers

    What is the name given to the large fungal structure that can be found in the Honey Fungus (Armillaria ostoyae)?

    <p>Mycelia (C)</p> Signup and view all the answers

    What is a major consequence of using fungicides in modern agricultural practices?

    <p>Increased reliance on fertilizers (B)</p> Signup and view all the answers

    Which of the following statements is TRUE about the relationship between ants and fungi in the text?

    <p>The ants and fungi have co-evolved together. (D)</p> Signup and view all the answers

    What is a key role of fungi in ecosystems?

    <p>They decompose organic matter, releasing nutrients back into the environment. (B)</p> Signup and view all the answers

    What adaptation allows gymnosperms and angiosperms to thrive in a terrestrial environment?

    <p>The presence of seeds, which provide protection and nourishment for the embryo. (B)</p> Signup and view all the answers

    How do mycorrhizal fungi benefit plants?

    <p>They provide the plant with water and nutrients. (C)</p> Signup and view all the answers

    Angiosperms utilize a process called double fertilization. What is the purpose of double fertilization?

    <p>To produce both a diploid zygote and a triploid endosperm. (A)</p> Signup and view all the answers

    How do some angiosperms avoid self-fertilization?

    <p>They have mechanisms to prevent pollen from landing on the stigma of the same flower. (B)</p> Signup and view all the answers

    What is the primary way that fungi obtain nutrients?

    <p>Absorption (D)</p> Signup and view all the answers

    Lichens are a fascinating example of symbiosis. What two organisms are involved in this symbiotic relationship?

    <p>A fungus and an algae (C)</p> Signup and view all the answers

    Flashcards

    Characteristics of Fungi

    Fungi are eukaryotic organisms, often decomposers, that reproduce via spores.

    Multicellularity

    Multicellularity evolved multiple times in eukaryotic lineages, leading to diverse life forms.

    Importance of Fungi in Ecosystems

    Fungi play crucial roles as decomposers, nutrient recyclers, and symbiotic partners.

    Eukaryotic Domain

    Both plants and fungi belong to the domain Eukarya, indicating a shared cellular structure.

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    Convergent Evolution

    The independent evolution of similar traits in different lineages, such as multicellularity.

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    What are fungi?

    Fungi are heterotrophs that absorb nutrients and lack chlorophyll.

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    Importance of mycorrhizal fungi

    Mycorrhizal fungi form mutualistic relationships with plants, aiding nutrient cycling.

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    Land plants origins

    Land plants evolved from green algae, facing challenges like gravity and water availability.

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    Key adaptations of gymnosperms and angiosperms

    Seeds and pollen are crucial adaptations for reproduction on land.

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    Adaptations of angiosperms

    Angiosperms have flowers, fruits, and double fertilization for reproduction.

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    Alkaloids

    Nitrogen-containing compounds; some are toxic and act as stimulants or analgesics.

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    Tannins

    Bitter compounds that can repel predators and have antioxidant properties.

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    Terpenes

    Large group of hydrocarbons known for strong smells, often repelling predators and having medicinal uses.

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    Flavonoids

    Plant pigments that can be bitter and act as antioxidants.

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    Gymnosperms

    Seed plants with 'naked seeds' not enclosed in an ovary.

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    Angiosperms

    Seed plants that produce seeds enclosed within a fruit.

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    Gametophyte

    The haploid phase that produces gametes in a plant's lifecycle.

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    Sporophyte

    The diploid phase in plant lifecycle that produces spores.

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    Crenarcheotes

    Common ancestor of all life, part of Domain Bacteria.

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    Mycete

    A term meaning fungus.

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    Ascomycetes

    Sac fungi named for their saclike structures, or asci.

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    Basidiomycetes

    Group including mushrooms, puffballs, and shelf fungi.

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    Chytrid fungi

    Fungi implicated in global amphibian declines.

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    Leaf-Cutter Ants

    Ants that farm fungi by feeding on them and allowing fungi to break down leaves.

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    Mycorrhizae

    Plant symbionts that help with nutrient acquisition.

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    Fungicide treatments

    Modern practices disrupting mycorrhizae, leading to increased fertilizer use.

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    Lichens

    A symbiotic relationship between a photosynthetic organism and fungi.

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    Fungi

    Heterotrophic organisms that feed by absorption and lack chlorophyll.

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    Fungus-Animal Symbiosis

    The co-evolution of ants and fungi.

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    Mycorrhizal Fungi

    Fungi that form mutualistic symbioses with many plant roots.

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    Green Algae

    Ancestors of land plants that adapted to terrestrial environments.

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    Key Adaptations of Angiosperms

    Includes flowers, fruits, and double fertilization for reproduction.

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    Seed Dispersal

    The movement or transport of seeds away from the parent plant.

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    Animal Symbiosis

    Mutual relationships between angiosperms and animals for pollination and seed dispersal.

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    Heterospory

    The production of two types of spores: megaspores (female) and microspores (male).

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    Reduced Gametophytes

    Very small gametophytes that develop within sporophyte walls, receiving nutrients from them.

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    Homosporous

    Plants that produce one kind of spore, leading to bisexual gametophytes, such as ferns.

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    Ovules

    Structures in seed plants that develop into seeds after fertilization, containing the female gametophyte.

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    Pollen

    Fine powder produced by microsporangia that carries sperm to fertilize ovules.

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    Seed Advantages

    Seeds contain an embryo and food supply, allowing for long-distance dispersal and dormancy.

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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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    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.

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