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BJU Life science10
Bob Jones Life Science Chapter 10
Term | Definition |
---|---|
kingdom Plantae | |
botany | The study of plants |
node | A region on a stem where leaf is or was attached. |
taproot system | A type of root system having one or a few main roots that are thicker and longer than the other roots of the plant. |
fibrous root system | A type of root system having a cluster of roots that are about equal in size. |
woody stem | A harder, non-flexible type of plant stem. |
herbaceous stem | Softer, more flexible, and often green plant stems. |
vein | In plants, the vascular tissues in leaf blades. |
xylem | The plant tissue characterized by long hollow cells that carry water. |
phloem | A plant tissue that conducts dissolved food in a plant. |
vascular bundle | A strand of vascular tissue (xylem and phloem) in the leaves, young plants, and non-woody stems. |
fiber | Long thick-walled cells that function to support a plant. |
epidermis | A tissue that serves as a protective covering layer in plants |
stomata (sing. stoma) | Openings between guard cells of a leaf that permit water vapor and gases to pass into and out of the leaf. |
guard cell | One of the cells that surround a stoma on a plant leaf and control the opening and closing of the stoma |
transpiration | The release of water from plant leaves through stomata |
palisade layer | The upper layer of leaf tissue that consists of tall, thin, closely packed cells that carry on the majority of photosynthesis |
spongy layer | The lower layer of leaf tissue consisting of loosely packed cells that carry on photosynthesis and have many air spaces between them |
hormone | A chemical produced by living cells that is transported to other body tissues where it causes a specific effect |
tropism | The growth of plants in response to external stimuli such as light (phototropism), gravity (gravitropism), and touch (thigmotropism). |
phototropism | The growth and movement of a plant part in response to light |
thigmotropism | The growth and movement of a plant part in response to touch |
gravitropism | The growth and movement of a plant part in response to gravity |
photoperiodism | The response of a plant to changes in the length of light and dark periods |