| explain the first transport system of plants | carrying water and mineral ions from roots upwards in the xylem tissue |
| explain the second transport system of plants | carrying substances made by photosynthesis up or down in phloem tissue |
| explain the Dicotyledonous | Dicotyledonous (di cottal ee donus) plants produce
seeds with two cotyledons (organs that act as food
store and are first leaves following germination) |
| what is in a root | root hair, epidermis, endodermis, xylem, phloem, pericycle, cortex, medulla/pith, stele |
| what is in a shoot/stem | epidermis, parenchyma, xylem, phloem, epidermal hair, medulla/pith, collenchyma, cortex |
| what is in a leaf | upper epidermis, lower epidermis, collenchyma, midrib, phloem, xylem, mesophyll (palisade and spongy), stoma, parenchyma |
| explain the shape of the xylem in a dicot root | comprised of an X shape xylem core with phloem in between, enabling root to withstand pulling force |
| explain role of endodermis in dicot root | surrounds the vascular bundle, it is involved in water loading into xylem |
| in dicot cell what does the pericycle do. | involved in producing cambium |
| what does cambium do | actively dividing meristimatic cells located between the xylem and the phloem in the stem and the root of a vascular plant, and is the source of secondary xylem and phloem growth |
| what does the cortex do in dicot root | contains stored carbohydrates or other substances such as resins, latex made out of parenchyma cells |
| what does the collenchyma in the dicot stem do. | provides extra structural support as the cells have thick edges particular in regions of new growth. extra cellulose in corners of cells |
| what does the parenchyma do in the dicot stem | contains chloroplasts |
| what does the medulla /pith do in the dicot stem | comprises the central role in support as cells are turgid, and storage in the large central vacuoles. |
| what is the midrib in the leaf | the midrib is the main vein in the leaf which provides structure and branches out into many smaller veins |
| what does the upper epidermis in the leaf do | allows light to reach mesophyll. Covered with waterproof cuticle. think layer of cells |
| what does the collenchyma do in the leaf do | strengthens the leaf |
| what does the mesophyll - palisade in the leaf do | parenchyma cells contain chloroplasts. spongey: air sacs for air circulation |
| lower epidermis (and stoma) | gas exchange |
