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    Assignment in Textbook

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    Assignment in Textbook

    Uploaded by

    0.avelynx.0
    9 views3 pages

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    9 views3 pages

    Assignment in Textbook

    Uploaded by

    0.avelynx.0

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
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    Assignment in Textbook

    1. A. Weeds are unwanted plants that can disrupt the growth and
    health of crops, landscapes, and gardens.
    B.Ability to regenerate.
    Possession of different devices for dispersal.
    They are resistant to disease and insect.
    2. A. Man
    Wind
    Water
    Animals
    B.Annual, Biennial, Perennial
    C.Terrestrial, Aquatic, Parasitic
    3. They can pose a harm to animals because of the high nitrate
    content of the shoots.
    Affect the health of humans.
    Cause a reduction in crop yield.
    4. Adds organic matter to the soil.
    Provides a vegetative cover to protect the soil surface against
    erosion.
    Used to beautify the surroundings.
    5. Chemical Control
    Mechanical Method
    Biological Method

    Assignment in Slide
    1. Dandelion (Taraxacum officinale): Dispersal: Wind.
    2. Crabgrass (Digitaria spp.): Dispersal: Seeds that shatter and
    spread easily.
    3. Chickweed (Stellaria media): Dispersal: Tiny seeds that
    stick to animals and clothing.
    4. Clover (Trifolium spp.): Dispersal: Seeds contained in the
    clover head.
    5. Nutsedge (Cyperus spp.): Dispersal: Tubers and nutlets
    (small, hard fruits).
    6. Purslane (Portulaca oleracea): Dispersal: Seeds ejected
    from the capsule when touched.
    7. Dock (Rumex spp.): Dispersal: Seeds with hooked barbs
    that cling to fur and clothing.
    8. Creeping Woodsorrel (Oxalis spp.): Dispersal: Seeds
    explosively ejected from the seedpod.
    9. Plantain (Plantago spp.): Dispersal: Tiny wind-dispersed
    seeds.
    10. Quinoa (Chenopodium quinoa): Dispersal: Seeds.
    11. Pigweed (Amaranthus spp.): Dispersal: Tiny, black
    seeds that can remain dormant in soil for many years.
    12. Shepherd's Purse (Capsella bursa-pastoris): Dispersal:
    Triangular seed pods that shatter, releasing numerous seeds.
    13. Bindweed (Convolvulus arvensis): Dispersal: Large
    seeds spread by animals and bursting seed pods.
    14. Yellow Woodsorrel (Oxalis stricta): Dispersal: Seeds
    with a fleshy elaiosome (attachment) attractive to ants.
    15. Common Ragweed (Ambrosia artemisiifolia):
    Dispersal: Wind-dispersed pollen grains, not seeds.
    16. Creeping Charlie (Glechoma hederacea): Dispersal:
    Spreading stems that root at nodes and fragmentation of
    stems.
    17. Nimblewill (Muhlenbergia schreberi): Dispersal:
    Seeds with fluffy awns for wind dispersal.
    18. Oxalis (Oxalis spp.) (This is a broader category than
    Creeping Woodsorrel): Dispersal: Explosive seed dispersal
    from seedpods.
    19. Doveweed (Eupatorium purpureum): Dispersal: Tiny
    seeds with pappus hairs for wind dispersal.
    20. Horsetail (Equisetum spp.): Dispersal: Spores, not
    seeds.

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