Term
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Definition
| Dormancy is the temporary suspension of biological activity, such as growth or movement. It is a response to adverse environmental conditions, such as drought or cold. |
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Term
| define the three conditions for seed dormancy: |
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Definition
stratification - long-term cold exposure
scarification - breakdown of seed coat
afterripening - the need for the seed to mature |
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Term
describe the conditions for a seed to break dormancy and germinate:
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Definition
-the seed needs to be viable
-correct environmental conditions, such as light, temperature, water, and oxygen levels |
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Term
| define epigeal germination, and give a benefit and drawback: |
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Definition
| Epigeal germination is above-ground cotyledon opening. A benefit of epigeal germination is the opportunity for early photosynthesis. A drawback is that the plant can be grazed early and die. |
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Term
| define hypogeal germination, and name a benefit and drawback: |
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Definition
| Hypogeal germination is the opening of the cotyledons below ground. A benefit of hypogeal germination is that the plant is protected from early grazing. A drawback is that the plant can't begin to photosynthesize until its true leaves appear. |
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Term
| name some methods of seed dispersl: |
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Definition
-wind transportation
-water transportation
-animal transportation
-explosion transportation |
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Term
| name some ways animals transport seeds: |
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Definition
-seed becomes attached to animal fur/feathers
-animal/bird eats seeds and deposits them elsewhere
-animals collect seeds and store them underground |
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Term
define short-range seed dispersal, and give a drawback and benefit:
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Definition
| Short-range seed dispersal is where the seeds land under/near their parent plant. A benefit is that the seed will land in a favorable habitat. A drawback is that the seed will be completing for resources with the parent plant. |
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Term
| define long-range seed dispersal, and give a benefit and drawback: |
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Definition
| Long-range seed dispersal is where seeds are carried far from the parent plant. A benefit is that the seed does not have to compete with the parent plant for resources. A drawback is that the seed may land in an unsuitable habitat. |
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Term
| define very long-range seed dispersal, and give a benefit and drawback: |
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Definition
| Very long-range seed dispersal is where the seed is carried very far away from the parent plant, usually by humans or rivers/oceans. A benefit is that the seed is nowhere near its predators or parent plant, so it does not have to compete for resources. A drawback is that the seed could land in a habitat in an inhospitable climate where it cannot grow. |
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