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vocab.
biology 2
| Question | Answer |
|---|---|
| parenhyma cell | most flexible thin walled cells found through out a plant |
| collenchyma cell | plant cells that often are elongated and occur in long strands or cylinders that provide support for the surroundings cells |
| sclerenchyma cell | plant cells that lack cytoplasm and other living components when they mature but their thick rigid cells walls remain. |
| meristem | regions of rapidly dividing cells |
| vascular cambium | is a thin cylinder of meristematic tissue that can run the entire length of roots and stems. |
| cork cambium | produces cells that develop tough cell walls |
| epidermis | the layer of cells that makes up the outer coverings on a plant is dermal tissue. |
| guard cell | the two cells that form a stoma |
| xylem | is the water carrying vascular tissue composedd of specialized cells vessels elements and tracheids. |
| vessel element | are tubular cells that are stacked end to end forming strands of xylem called vessels. |
| tracheid | are long cylindrical cells with pitted ends. |
| phloem | the main food carrying tissue |
| sieve tube memeber | contains cytoplasm but lacks a nucleus and ribosomes when it is mature. |
| companion cell | next to sieve tube memebers |
| ground tissue | consist of parenchyma collenchyma and sclerenchyma cells and have diverse functions. |
| root cap | it consists of parenchyma cells that help protect the root tissues as the root grows. |
| cortex | the layer below this epidermal layer |
| endodermis | at the inner boundary of the cortex is a layer of cells |
| pericycle | the layer of cells directly next to the endodermis toward the center of the root. |
| petiole | depending on the plant species the blade might be attached to the stem by a stalk |
| palisade mesophyll | they contain many chloroplasts and make up the tissue. |
| spongy mesophyll | consisting of irregularly shaped loosely packed cells with spaces surrounding them. |
| transpiration | water evaporates from the inside of a leaf to the outside through stomata. |
| auxun | one of the first plant hormones to be identified |
| gibberellins | the group of plant hormones |
| ethylene | it is a simple compound compose of two carbon and four hydrogen atoms |
| cytokinin | produced in rapidly dividing cells |
| nastic response | a plant response that causes movement that is not dependent on the direction of the stimulus |
| tropism | is a plants growth response to an external stimulus. |
Created by:
joelsawyer
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