3. For this demonstration, we took two bok choy leaves. One leaf we kept the same, the other we removed sixty percent of the leafy area. We placed the leaves in blue dye and let it sit for ten minutes. After, we cut the leaf from the bottom up into one centimeter pieces. Once cut, it was visible that the bok choy leaf that had not been partially removed had more blue dye in the upper petiole compared to the other bok choy leaf. In the bok choy leaf where sixty percent of leafy area had been removed, the dye had not moved as far up. When we reduced the leaf area, we removed the stomata, which are important for transpiration. Leaves are covered with pores called stomata. Water is taken up by the roots or bottom of the leaf in this case, and is
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Since less stomata were present of the reduced leaf, less water/dye was pulled up through the bottom of the leaf, and the dye did not move as far up.
4. a. Based on my drawing of the anatomy of a dicot leaf, I identified the following structures: vacuole, epidermis, cell wall, guard cell, stoma, chloroplast, palisade cells, mesophyll cells, sieve plate, nucleus, sheath cell, xylem, and intercellular space
b. The nucleus of a cell contains all of the DNA information of that cell. DNA is stored as chromatin in the nucleus. Without this information and the nucleus, cell replication and all activity in the cell would not be possible. Chloroplasts are plastids that contain chlorophyll and house photosynthesis (Investigating Plant Cells 4). They convert solar energy into sugars that can be used by the plant. The cell wall is the layer outside in …show more content…
It also helps to shape the cell. Made mostly of cellulose because it needs to be strong. It also helps regulate what goes in and out of the cell. Has a primary and secondary wall. The primary cell wall is extensible and can undergo reversible changes in thickness (Investigating Plant Cells 3). Primary cell walls have plasmodesmata (Investigating Plant Cells 3). Secondary cell walls are stiff and can’t undergo reversible changes in thickness, so there is no cellular expansion (Investigating Plant Cells 3). The central vacuole is often very large and takes up most of the cell since it holds the cell’s water. The central vacuole also holds wastes and food and helps support the cell. “Vacuoles are surrounded by tonoplast which regulate passage into and out of the vacuole” (Investigating Plant Cells 4). “Vacuoles also store dissolved salts and provide hydrostatic support” (Investigating Plant Cells 4). The epidermis is the outermost layer of cells that covers the plant. It’s for protection against damage, infection, and water loss (Investigating Plant Cells 3). Guard cells surround the stomata of the plant and
Since less stomata were present of the reduced leaf, less water/dye was pulled up through the bottom of the leaf, and the dye did not move as far up.
4. a. Based on my drawing of the anatomy of a dicot leaf, I identified the following structures: vacuole, epidermis, cell wall, guard cell, stoma, chloroplast, palisade cells, mesophyll cells, sieve plate, nucleus, sheath cell, xylem, and intercellular space
b. The nucleus of a cell contains all of the DNA information of that cell. DNA is stored as chromatin in the nucleus. Without this information and the nucleus, cell replication and all activity in the cell would not be possible. Chloroplasts are plastids that contain chlorophyll and house photosynthesis (Investigating Plant Cells 4). They convert solar energy into sugars that can be used by the plant. The cell wall is the layer outside in …show more content…
It also helps to shape the cell. Made mostly of cellulose because it needs to be strong. It also helps regulate what goes in and out of the cell. Has a primary and secondary wall. The primary cell wall is extensible and can undergo reversible changes in thickness (Investigating Plant Cells 3). Primary cell walls have plasmodesmata (Investigating Plant Cells 3). Secondary cell walls are stiff and can’t undergo reversible changes in thickness, so there is no cellular expansion (Investigating Plant Cells 3). The central vacuole is often very large and takes up most of the cell since it holds the cell’s water. The central vacuole also holds wastes and food and helps support the cell. “Vacuoles are surrounded by tonoplast which regulate passage into and out of the vacuole” (Investigating Plant Cells 4). “Vacuoles also store dissolved salts and provide hydrostatic support” (Investigating Plant Cells 4). The epidermis is the outermost layer of cells that covers the plant. It’s for protection against damage, infection, and water loss (Investigating Plant Cells 3). Guard cells surround the stomata of the plant and