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Plant Form and Func.
AP Bio, Chap 23
| Question | Answer |
|---|---|
| The flowering plant are commonly called _____. | Angiosperm |
| How are the functions of roots and shoots similar and different? | Roots are underground; shoots are above ground. Both are vital for the plant: roots gather water, while shoots conduct photosynthesis |
| What characteristics show the difference between monocots and dicots? | Monocots only have one cotyledon in their seeds, compared to two. Their pollen has one pore, compared to three. Also, their leaves form a parallel pattern, compared to the net pattern of dicots. |
| Why should all structures of plants, including “typical” leaves, roots and stems be considered “special adaptations”? | Because all of these parts are adaptations from their sea-living ancestors |
| Why do trees eventually die after being girdled? | The inner tree is dead, with only the bark alive. If that layer, containing phloem sap, is removed; the tree has to die |
| What’s the casparian strip? How does it work? | A thickened wall surrounding primary roots to prevent excess soil solutions from being absorbed. |
| A sweet potato has no “eyes” such as those found on a white potato because sweet potato is a ____-adapted for food storage, whereas the white potato is an underground ____ adapted for the same purpose. | Root; stem |
| Carnivorous plants, such as Venus flay trap, trap insects as a source of ______-which is difficult to obtain from the boggy soils in which they live. | Nitrogen |
| What would happen if a plant didn’t have waxes? What might happen to the endodermis? What effects might that have on the plant, and why? | The plant would stop absorbing water, and would die |
| Describe the process by which nitrogen-fixing bacteria form nodules on the roots of legumes. | The bacteria invade the root system, and form staying nodules on the roots. |
| In the myccohizal relationship, how do both the fungus and the plant benefit? | The plant feeds the fungi, while the fungi give the plant nutrients |
| What is the role of abscisic acid in controlling the closing of stomata? | Abscisic acid is the hormone that triggers the openings and closings. |
| The major factors which affection the opening and closing of stomate are what? | It closes when soil water is insufficient to keep up with transpiration |
| Water moves in the phloem by ________ pressure. | turgor |
| In what form can plants obtain nitrogen? | Plants absorb nitrogen through their roots as amino acids. |
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