write 2 methods of seed dispersal of mustard seed
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Answer:
Because plants cannot walk around and take their seeds to other places, they have developed other methods to disperse (move) their seeds. The most common methods are wind, water, animals, explosion and fire.
Explanation:
Different Types of Seed Dispersal
Gravity: Where the seeds simply fall to the ground, like apples, black locust tree seed pods, common mullein and teasel seeds.
Animals: Wildlife will help to spread seeds, like forgotten walnuts and acorns previously stored for winter. Birds also eat the fruit of plants such as wild grape, Virginia creeper, European buckthorn and staghorn sumac, which disperses seeds in their droppings after digestion.
Hitch Hiking: Some plants have also developed fur and feather hitch-hiking adaptations like hooks, barbs and spines, displayed by species such as common burdock, devil’s beggar-tick and enchanter’s nightshade.
Dehiscence: Ballistic seed dispersal is another adaptation to release seeds through explosive dehiscence; a noteworthy example is the common jewelweed which rapidly releases a seed when touched. Garlic mustard silique and common milkweed follicles also undergo dehiscence and open at seed maturity, though milkweed also develops white hairs that allow for wind dispersal as well.
Wind: Other species with wind capabilities are sow thistle, Canada goldenrod, and maple and ash samara. Common cattail also disperses well in the wind and in the water.
Lastly, humans play a large role in seed dispersal, with many activities like farming, gardening, recreation, and transportation causing widespread deliberate and accidental introductions and cultivations.