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What is the embryo axis?
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What is the epicotyl?
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HORT1001 Wk 9
Seed Morphology; Seed Physiology
| Question | Answer |
|---|---|
| What is the embryo axis? | Embryonic root and shoot |
| What is the epicotyl? | Part of the embryo's axis above the cotyledon |
| What is the hypocotyl? | Part of the embryo's axis below the cotyledon |
| What part is derived from the cell resulting from the fusion of the egg and the sperm? | The embryo |
| Describe why apomixis results in a seed that is actually a form of asexual propagation | Develops solely from maternal tissue; vegetative cells in flower develop into zygotes to form seeds |
| Of the tissues making up the embryo axis (plumule, epicotyl, hypocotyl, radicle) which are shoot tissue and which are root tissue | Shoot tissue: Plumule, epicotyl, and hypocotyl Root tissue: Radicle |
| What seed structure(s) contains carbohydrates? | Cotyldons |
| When you eat green beans or snow peas as a (culinary) vegetable, are you eating pericarp or seed coat or both? | Both, Ovule wall is the seed coat; Ovary wall is the pericarp |
| What external factors are required for germination? | Water, oxygen, sunlight, temperature |
| Outline the process through which the seed's embryo receives useful energy from the starch stored in the cotyledon or endosperm. | Respiration converts the starch stored in the endosperm or cotyledon into Adenosine triphosphate used in apical meristems and the radicle for cell division |
| What are the factors required for successful long term seed storage? How do these compare to the factors required for germination? | Dry, cold, no oxygen; Germination can be restricted by limiting an external factor |
| What are the different types of dormancy? | Endodormancy: Temperate plants, internal biochemical processes, first stage Ectodormancy: External factors aren't being met |
| How do you encourage germination in a seed with ectodormancy? | Change conditions to be optimal for germination |
| Fluffy fibers attached to seeds that let them fly and burrs that get caught on animal coats are adaptations used by seeds for: | Dispersing the seed |
| The epicotyl is ______ tissue. | Shoot |
| The cotyledon is ______ tissue. | Shoot |
| The radicle is ______ tissue. | Root |
| The hypocotyl is ______ tissue | Shoot |
| If a quiescent, but not dormant, seed is planted in the soil, and has appropriate growing conditions, it begins to respire. What does respiration provide to the germinating seed? | ATP |
| Fatty acids are components of: | Lipids |
| What seed structure(s) store carbohydrates important for germination and initial seedling growth? | Cotyledon and endosperm |
| Short term seed storage at home typically focuses on limiting which condition required for germination? | Water |
| Dormancy is a strategy used by seeds primarily for: | Surviving harsh conditions |
| Immature tissue versus seed structure Egg Ovule wall Ovary wall 2 polar nuclei and sperm | Embryo Seed coat Pericarp Endosperm |
| The cotyledons attachment point to the embryo axis is the: | Transition zone between hypocotyl and epicotyl |
| Scarification is used to: | Break impermeable seed coat |
| Starch is made up of: | A chain of glucose |
Created by:
kylee1542
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