Lab+10-+Plants

=﻿Lab 10: Plants=

Exercise 1: Plant Parts and Functions
picture before: (all nice and green)

__1. Stems:__ They are a support for the plant, and it is also the location in which the water and nutrients that run through the plant from the roots __2. Leaves:__ The location in which the food is made. Through the process of photosynthesis. The leaves capture the light to make this process possible. __3. Buds__: Found at the base of leaves. Produces a blossom. __4. Roots:__ Absorb minerals and water from the soil that the plant has been placed in. __5. Flowers:__ The reproductive part of the plant where the pollen and the ovules are located __6. Fruit:__ Covering for the seeds. __7. Seeds__: Contains the new plant. []

picture after: (all stained and red and droopy)

Diagram: A.= Epidermis- stained red B= Collenchyma C= Parenchyma D= Vascular tissue - stained red E= Sclerenchyma - stained red

QUESTIONS: The difference between transpiration and capillary action is that transpiration involves gases moving upwards against gravity due to pressure and/or temperature, like evaporation. Capillary action involves liquids moving upwards due to tension. Capillary action was seen in this experiment. They are found in the wood parts of the tree; the bark. Yes it does. Sap is found in the xylem tissue of a tree.
 * 1. What is the difference between transpiration and capillary action? Which did you see in this experiment? **
 * 2. Where is xylem and phloem tubes found in a tree? **
 * 3. Does transpiration occur when the tree drops its leaves in fall? **
 * Syrup: **

[[image:Lab_10-starch.jpg]]
A.  The passing of any substance through any membrane. <span style="font-family: Arial,Helvetica;">Osmosis is the diffusion of only water through a permeable membrane. <span style="font-family: Arial,Helvetica;">In diffusion, it is moving, but separating through any type of membrane. In osmosis the membrane it is moving through is partially permeable. <span style="font-family: Arial,Helvetica;">Iodine is called an indicator because it is used to bring out the contrasting color of something in order to show more detail. <span style="font-family: Arial,Helvetica;"> The membrane will only allow specific molecules or ions to pass through.
 * <span style="font-family: Arial,Helvetica;">1. Define diffusion. **
 * <span style="font-family: Arial,Helvetica;">2. Define osmosis. **
 * <span style="font-family: Arial,Helvetica;">3. What is the main difference between osmosis and diffusion. **
 * <span style="font-family: Arial,Helvetica;">4. Why is iodine called an indicator? **
 * <span style="font-family: Arial,Helvetica;">5. Molecules tend to move from areas of __HIGH__ concentration to areas of __LOW__ concentration. **
 * <span style="font-family: Arial,Helvetica;">6. What does "semi" or selectively permeable mean? **

<span style="font-family: Arial,Helvetica;"> Baggie. <span style="font-family: Arial,Helvetica;">Beaker. <span style="font-family: Arial,Helvetica;">Beaker. <span style="font-family: Arial,Helvetica;">Baggie. <span style="font-family: Arial,Helvetica;">Baggie.
 * <span style="font-family: Arial,Helvetica;">B. **
 * <span style="font-family: Arial,Helvetica;">1. Is the baggie or beaker more concentrated in starch? **
 * <span style="font-family: Arial,Helvetica;">2. Is the baggie or beaker more concentrated in iodine? **
 * <span style="font-family: Arial,Helvetica;">3. Iodine solution: is the baggie or the beaker hypertonic? **
 * <span style="font-family: Arial,Helvetica;">4. Starch solution: is the baggie or the beaker hypertonic? **
 * <span style="font-family: Arial,Helvetica;">5. Which one is hypotonic in relation to starch, baggie or beaker? **

<span style="font-family: Arial,Helvetica;">Out of the bag. <span style="font-family: Arial,Helvetica;">Into the bag. <span style="font-family: Arial,Helvetica;">It would turn the dark purple and same with the color of the solution in the beaker. <span style="font-family: Arial,Helvetica;">The baggie would turn yellow. The solution in the beaker would also turn yellow. <span style="font-family: Arial,Helvetica;">I believe the starch will turn a different color.
 * <span style="font-family: Arial,Helvetica;">C. **
 * <span style="font-family: Arial,Helvetica;">1. If the baggie was permeable to starch, which way would the starch move, into the bag or out of the bag? **
 * <span style="font-family: Arial,Helvetica;">2. If the baggie was permeable to iodine, which way would the iodine move, into or out of the bag? **
 * <span style="font-family: Arial,Helvetica;">3. If the baggie was permeable to iodine, what color would you expect the solution in the baggie to turn? What about the solution in the beaker? **
 * <span style="font-family: Arial,Helvetica;">4. If the baggie was permeable to starch, what color would you expect the solution in the baggie to turn? What about the solution in the beaker? **
 * <span style="font-family: Arial,Helvetica;">5. Make a prediction about what you think will happen: **

<span style="font-family: Arial,Helvetica;">D. Data Table
 * || **Starting Color** || **Color after 15 Minutes** ||
 * **Solution in Beaker** || light yellow || dark yellow ||
 * **Solution in Bag** || white || dark purple ||

<span style="font-family: Arial,Helvetica;"> The iodine. <span style="font-family: Arial,Helvetica;">The starch inside of the baggie was the only thing to change color. Therefore, the iodine must have moved into the baggie. <span style="font-family: Arial,Helvetica;">Yes because the starch did not pass through, only the iodine. <span style="font-family: Arial,Helvetica;">I do not think the bag is permeable to water because only the iodine passed through the bag, not the water. I know this because the water level within the baggie did not change. <span style="font-family: Arial,Helvetica;">No there was no net gain of water into the bag. The bag was filled halfway with the contents and remained the same after the experiment.
 * <span style="font-family: Arial,Helvetica;">E. Analysis **
 * <span style="font-family: Arial,Helvetica;">1. Based on your observations, which substance moved, the iodine or the starch? **
 * <span style="font-family: Arial,Helvetica;">2. How did you determine this? **
 * <span style="font-family: Arial,Helvetica;">3. Is the plastic baggie selectively permeable? **
 * <span style="font-family: Arial,Helvetica;">4. Is the bag permeable to water? Why do you think so? **
 * <span style="font-family: Arial,Helvetica;">5. Was there a net gain of water into the bag? Did you measure the contents of the bag in ml after the experiment? What was responsible for your observation? **