Members | Characteristics of Woody Stems | Thumb-war Infograph | Monocot and Dicot Lab | Characteristics of Living Things Lab | Comparing Plants and Animals | Food Lab | Cell Transport | Protists | Cell Size Lab | How Many Drops of Water Can a Penny Hold | Light Intensity Activity

Members

Shayne
Austin
Dan
Kyle

Characteristics of Woody Stems


1. We think it is three years old.
2. No it hasn't.
3. It could be because of weather conditions or maybe the amount of plants in the area it was in increased so it had to compete for nutrients.
4. One per node
5.Opposite
6. 1st season: 10 2nd season: 6 3rd Season: 2
7. No
8. No but the arrangement is in the same pattern.
9. Small little opening on the twig.
10. for oxygen to enter and CO2 to exit.

Thumb-war Infograph

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Monocot and Dicot Lab

Corn Seed
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You can find the young leaves there are 6 of them.
The skin is the outer red part.
Monocot.
Bean Seed
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No because the bean seed has a split membrane which means that it is already split and a corn seed needs to be cut in half.
Dicot
Split Pea
It is a dicot because it has a split lobe.
Dicot
Stem Slides
Monocot stems have vascular bundles randomly, whereas dicot stems have them arranged in a ring pattern.
The two types of tissues are Xylem and Phloem. Xylem carries the water and nutrients. The Phloem carries the
food, or glucose (6CH12O6).
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Dicot


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Monocot

Herbaceous Plants
Monocot
Cannabis_sativa_plant_(4).JPG
Cannibas Sativ or Hemp
Dicot
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Lilium
Woody Plants

Sites/Resources:
Wikianswers.com
Wikipedia.or

Characteristics of Living Things Lab

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Before

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After

Yeast Budding

Analysis/Conclusions:
1. Why did the bromothymol blue change colors when a classmate exhaled into the test tube?

2. What does the production of carbon dioxide gas in the one flask indicate about the yeast?

3. How can you be sure that the carbon dioxide gas was produced by the yeast?

4. What does the presence of buds indicate about the yeast?

5. Why were more buds present in one of the mixtures?

1. The bromothymol blue changed colors to indicate that the CO2 was being exhaled into it and making carbonic acid.
2. That the yeast is living because it is using respiration.
3. Because when a sugar substance was added it started feeding on it which started respiration.
4.The presence of buds indicates that the yeast is multiplying.
5. Because they were reproducing faster with the food source being present.

Comparing Plants and Animals


Onion Cell
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Onion Cell


1. The onion cells are more squared or rectangular shaped and are spread out in groups around the onion skin.
2. The cell membrane shriveled up because the salt solution was drying the cell up because it was taking the water out of the cell. since the water is being removed, the cell membrane will shrivel up.
3. I believe each cell is most likely 125 microns.
Cheek Cell
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Cheek Cell


1.They are round and spread out.
2.The purpose of adding the iodine to the slide was to help us see the cell.
3. We believe each cell to be about 125-187 microns.

Food Lab

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Cell Transport

Osmosis
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Before

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After

The water was able to permeate the dialysis tubing. This is shown by the
iodine changing the waters colors.
Osmosis is the movement of water to balance the salt concentrations. It moves from
areas of higher concentration to lower concentration.

Diffusion
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After

This is diffusion because instead of the water moving the salt moved. You can tell because the salt
made it easier to see the insides of a potato.
Diffusion is the movement of everything else but water. It moves from regions of higher concentration
to lower concentration. It spreads out the molecules in the cell.

Protists

Stentor
stentor.jpg
The Stentor is among the largest known unicellular organisms, at an amazing 2 millimeters. They are a genus of filter feeding heterotrichs.
They are usually horn shaped. I think it is probably 187.5 microns.
Sources:
http://en.wikipedia.org/wiki/Stentor_%28protozoa%29

Hydra
hydro.jpg
The Hydra is a simple fresh-water animal possessing radial symmetry. They can be found in fresh-water ponds, lakes, rivers and streams. They use their sensors to detect things around them, and also to consume their food. I believe they are about 500-750 microns.
Sources:
http://en.wikipedia.org/wiki/Hydra_%28genus%29

Daphnia
dafney.jpg
Daphnias are small planktonic crustacean creatures that range from .2 to 5 millimeters in size. They are commonly called water fleas because of the way they move. They can live any where from acidic swamps to fresh waters areas. I believe they are about 500 microns.
Sources:
http://en.wikipedia.org/wiki/Daphnia

Cell Size Lab

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1cm Cube:
SA=1x1x6
SA=6cm2
V=1x1x1
V=1

2cm Cube:
SA=2x2x6
SA=24
V=2x2x2
V=8

3cm Cube:
SA=3x3x6
SA=54
V=3x3x3
V=27
2011-11-03_0038.jpg
1x1x1 Before
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1x1x1 After


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2x2x2 Before
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2x2x2 After


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3x3x3 Before
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3x3x3 After



Analysis:
1. Compare and contrast the three cubes after they were sliced in half.
After each cell was sliced in half we saw that diffusion had occurred in each one.
2 .Which "cell" seemed to be most and least efficient at getting outside substances into the cell? Explain.
All the cells seemed to have the rate of diffusion because they were the same material. This is due to the fact that they were all made from the same substance, therefor, it makes sense that they had an equal amount of diffusion. However, the most efficient would be the smaller cell. This is because the solution filled the whole "cell" where the others did not. The least efficient would be the largest cube because it had more area to cover in the same amount of time.
3. Which of your calculations seems to explain what you observed in your cell models? Why do you think so?
The Ratio Calculation best showed what we observed in our cell models. It tells us that the bigger the cell, the longer it takes for the solution to pass through it.
4. Speculate on a relationship between cell size and efficiency. Your statement should resemble a hypothesis.
If the cells are made of the same substance, it shouldn't matter what size they are, they should each have a somewhat equal amount of diffusion. If there isdifference in rate of diffusion, it is only a small difference. But, if they have the same rate, it will fill different portions because they are different. Therefore, we believe that the larger the cell would be, the less efficient it would be. So, the smaller it is, the more efficient it should be.

How Many Drops of Water Can a Penny Hold

Regular water:
24
18
17
21
Average: 20 drops of water
22_drops_of_water.jpg

soap water
14
11
12
22
Average: 14.75 drops of water

Observations:
The water is being flattened by gravity. It is sticking to the coin while also sticking together. If you look closely at the coin while there is water on it, you can see that the water actually sticks out further then the coin.

Light Intensity Activity

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