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Seeds that are dispersed by animals often:
have hooks or edible flesh
are very small and light weight
have wings or parachutes
can float easily in water
have hooks or edible flesh
Seeds dispersed by animals, known as zoochory, have evolved specific adaptations to ensure attachment to animal fur or attraction via consumption. Hooks allow seeds to cling to animals, while fleshy fruits entice animals to eat them, ensuring dispersal through their digestive systems.
Seeds dispersed by animals, known as zoochory, have evolved specific adaptations to ensure attachment to animal fur or attraction via consumption. Hooks allow seeds to cling to animals, while fleshy fruits entice animals to eat them, ensuring dispersal through their digestive systems.
Think of hitchhiking: a seed with hooks is like a burr stuck to your socks after a walk in the woods, while a fleshy fruit is like a tasty snack that an animal carries away before discarding the pit.
The principle involves 'mutualistic dispersal'. For seeds with hooks (epizoochory), the mechanical structure ensures physical attachment to external surfaces. For fleshy fruits (endozoochory), the plant invests energy in sugars and color to reward the animal, which subsequently deposits the seeds in a new location, often with a supply of organic manure.
Epizoochory involves external attachment (hooks/spines).
Endozoochory involves internal transport (ingestion of fleshy fruits).
Animals play a crucial role in plant migration and ecosystem biodiversity.
Seeds can be carried over long distances.
Internal ingestion provides fertilization (nutrients) for the seed upon excretion.
Dependent on animal population density.
Risk of digestion destroying the seed if it is not tough-coated.
Forest regeneration through birds and mammals.
Invasive species spread via animal movement.
| Feature | Epizoochory | Endozoochory |
|---|---|---|
Mechanism | External (Hooks) | Internal (Edible) |
Seeds with wings or parachutes (Option C) are adapted for anemochory (wind dispersal).
Seeds that float (Option D) are adapted for hydrochory (water dispersal).
A is correct тАФ Seeds dispersed by animals utilize hooks to attach to fur or produce edible flesh to attract animals for ingestion.
Always link seed morphology to its environment; light/winged = wind, hooks/flesh = animals, buoyancy = water.
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