Which substance s are entering the bag and which are leaving the bag? What experimental evidence supports your answer?
A slice across a stem, at right angles to the axis of the stem, is a transverse section, T. Any slice parallel to the axis of a stem is a longitudinal section, L. A slice vertically down is a vertical section, V.
A slice parallel to the axis of the stem, along the radius, is a radial longitudinal section, R. A slice parallel to the axis of the stem, along a tangent to the cross-section, is a tangential longitudinal section, T. Cut a wedge-shaped transverse section across a soft stem, e. Note the groups of similar cells, tissues.
The epidermis is the one cell thick outer layer. It may have a waxy cuticle on the outside to protect against desiccation. The bundles of cells, vascular bundles, contain food conducting phloem cells on the outside and water conducting xylem cells on the inside.
The walls of the xylem cells, vessels, are strengthened. Old xylem forms wood. Groups of cells with very thick walls, sclerenchyma, strengthen the stem. Parenchyma tissue is the loose packing cells.
Between the xylem and the phloem are closely packed cells with large nuclei and thin walls, the cambium. Cambium cells produce new cells by mitosis to make the stem thicker. Draw a map diagram to show the different tissues.
Observe the remaining stump of a cut down tree or the sawn end of a thick branch. Note the sap wood, heart wood, annual rings, phloem and bark.
The appearance of the rays shows the type of section. In transverse section, T. In radial longitudinal section, R. Any broken appearance is caused by the section not being exactly radial. In tangential longitudinal section, T. Find the rays and identify the type of section.
|Characteristics of Life||Knowing a bit of chemistry is sure to make the learning experience here much smoother. Learn the principles of chemistry in this course.|
Parenchyma cells of tomato 1.Conclusion. Relating this to the potato chips: basically, as the concentration of salt in each solution increases, the water in that solution is less able to move to the potato, causing water from the potato to move to the solution, decreasing its length, weight and width.
The Scientific Method Scientific Method is a process of investigation where problems are identified and their explanations are tested by carrying out experiments. Observation: An unbiased, accurate report of an event. Hypothesis: An educated guess based on observations. Experiment: An experiment is designed to test a hypothesis.
Continue Reading →. Jun 17, · In fact, this osmosis experiment is a great way to teach any new biology student the gist of diffusion and the process of osmosis, regardless of age.
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Paris. Investigation of Water Potential of Potato Tuber Cells Essay - Investigation of Water Potential of Potato Tuber Cells Introduction This experiment is to find out the water potential of potato cells.
Abstract This lab was conducted in order to determine the molarity of sucrose concentration where the mass of potato tuber segments does not change, indicating an isosmotic concentration. By calculating the change of mass of the potato tuber cells prior to incubation against the mass after 5/5(2).
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