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BiologyII Chapter 21
Flash Cards
| Question | Answer |
|---|---|
| Name the 3 main types of plant cells. | Parenchyma Cells, Collenchyma Cells, and Sclerenchyma Cells |
| Parenchyma cell functions and an example of where these cells are found. | -cells found in a potato -functions are storage, photosynthesis, gas exchange, protection, and tissue repair and replacement. |
| Collenchyma cell functions and an example of where these cells are found. | -cells shaped like long strands or cylinders. -functions are support for surrounding tissues, provides flexibility for plant, and tissue repair and replacement. |
| Sclerenchyma cell functions and an example of where these cells are found. | -cells that lack cytoplasm -functions are support and transport of materials -two types of sclerenchyma cells: sclereids and fibers |
| Name the 4 main types of plant tissues. | Meristematic, Dermal, Vascular, and Ground |
| Describe meristemic tissues. | -regions of rapidly dividing cells |
| Describe dermal tissues. | -the outer layer of the dermal is the epidermis |
| Describe vascular tissues. | -xylem which transports water away from the roots and is composed of specialized cell called vessel elements and tracheids. -vessel elements are tubular cells stacked end-to-end that enable the free movement of water and dissolved substances. |
| Describe ground tissues. | -consist of parenchyma, collenchyma, and sclerenchyma cells -most common type of tissue found in plants -functions include photosynthesis, storage, and support |
| Describe root functions. | |
| List the layers of the root from the outside inward. | root hairs, epidermal, cortex, endodermis, casparian, and pericycle |
| Describe the functions of stems. | |
| Explain herbaceous and woody stems. | |
| Describe the functions of leaves. | |
| Name the 4 plant hormones. | Auxin, Gibberellins, Ethylene, and Cytokinins |
| Describe auxin's and how they affect a plant. | stimulates the lengthening of cells, affects the rate of growth in roots, stems, and leaves, causes plants to grow upward which is called apical dominance, and causes fruit to drop from the plant when they get ripe. |
| Describe gibberellins and how they affect a plant. | causes cell elongation, stimulates cell division, and affects seed growth, causes the plant to grow taller. |
| Describe ethylene and how they affect a plant. | affects the ripening of fruits, fruits are softer and sweeter that unripe fruits, the only known gaseous hormone, and found in plant tissues such as ripening fruits, dying leaves, and flowers |
| Describe cytokinins and how they affect a plant. | promotes cell division, produced in rapidly dividing cells, and when used in plants with auxins it causes the plant to grow rapidly |
| Describe a nastic response and give 2 examples. | a response of a plant that causes movement independent of the direction of the stimulus, is not a growth response, and it is reversible and can be repeated. Solar tracking of sunflowers and closing of a venus flytrap’s leaves. |
| Describe tropic response. | phototropism, gravitropism, and thigmotropism |
| Name and describe three tropisms. | phototropism-response to light caused by an unequal amounts of. gravitropism-response to gravity. thigmotropism-response to mechanical stimuli. |
Created by:
dayleemiller
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