• Rosette cellulose-synthesizing complexes-rose-shaped array of proteins that synthesize cellulose microtubules of cell walls of charophyceans and land plants…
1. Cell wall – Provides support and protection and is responsible for giving plant cells their shape.…
In response to this article I would have to say that it is quite an unprepared protestor unknowing of his own stupidity. He calls out the scientists fighting the overgrowth of this knotweed saying this and that, with reasonable arguments in my opinion, but then concludes with an overwhelmingly lacking solution of his own. John Stahl states, "I'm not sure how good knotweed will be as a paper source but it doesn't matter." Let's review John's solution . John's solution was to use knotweed as a paper source, yet he does not even know if it is in any sense an effective paper-producing resource other than the idea that it holds plenty of cellulose. Instead he uses examples of other plants that are useful in paper production, which have nothing to do with knot weed. He actually strays off topic a couple of times. Once with a discussion of mosquitoes and another with questions of God. And though I can tell his motives are honest with a great deal of emotional relevance, I do not see much as to logic or preparation into the essay.…
They are actually called duckweeds. Duckweeds are created by high nutrient levels and once the duckweed lays on the surface, it multiplies rapidly. If the duckweek completely covers the pond, it becomes a thick mat covering the surface of the water. Therefore, the duckweed will block the light from reaching other plants that live within the pond. Not only will it kill the some of the plants, but in some cases it kills the fish living within the…
Then we placed five Thalli in each well so that there would be a controlled start to the experiment. We then placed them in growth chambers every week so that they could have the proper conditions to grow. Every week we counted that thalli in each well, recorded the data, and refilled the wells with the solutions corresponding to the wells being filled. We did this for six weeks with an exception of one week because we didn’t have class. We also made sure that the labels on the tape were consistent with each other in case that would affect the amount of light each well got in the growth chamber. When calculating our results we averaged the difference of the duckweed in each of the wells for the water with the NP solution set from day one to the last day we checked them, and averaged the difference of the creek water from day one to the last day of the experiment as…
History is everything but a great man’s biography. It’s what causes great men to rise, and sacrifice their lives for others. It’s what causes millions of deaths. In 1933, a genocide by Adolf Hitler's Nazi Germany killed six million Jewish people. This was one of the deadliest genocides in the world. Its horrifying stories are still told today through the books like The Boy in the Striped Pajamas, Yellow Star, and much more. Similarly, Milkweed by Jerry Spinelli is another novel that keeps history alive to make sure the children of today understand their ancestors and cruelties of the past.…
The effect of crowding on Duckweed growth rate. Sarah Morscheck*, Olivia Drukker, Hannah Zeigerson, and Jacob Shaffer Methods: To test the effect of population density on Duckweed growth rate, we obtained 24 clear, clean, plastic cups and added 100 ml of artificial pond water. There were 8 cups in each treatment, high density had 100 thali, medium density had 50 thali, and low density had 10 thali. The cups were randomly placed on a tray.…
Cells: cell membrane, nucleus, cytoplasm; organelles – mitochondria, endoplasmic reticulum (smooth and rough), Golgi apparatus, lysosome…
Plant Cells have cell walls, which makes them appear rectangular or square in shape, these structures are composed of cellulose, hemicellulose and other materials, plant cells have chlorophyll the light absorbing pigment required for photosynthesis.…
Plant cells are eukaryotic cells i.e., the DNA in a plant cell is enclosed within the nucleus. The most important distinctive structure of plant cell is the presence of the cell wall outside the cell membrane. It forms the outer lining of the cell. The cell wall mostly constitutes of cellulose and its main function is providing support and rigidity. Plants cells also contain many membrane bound cellular structures. These organelles carry out specific functions necessary for survival and normal operation of the cells. There are a wide range of operations like producing hormones, enzymes, and all metabolic activities of the cell.…
All living organisms (plants, animals, and bacteria) are made up of cells. Any cell consists of many parts but the parts that play the key roles are the nucleus, cell membrane, and cytoplasm. The nucleus is like the “brain” of the cell (that also contains DNA). The cell membrane is like a wall that guards the cell. And the cytoplasm is a jelly-like substance which contains other smaller organelles like mitochondria that generates energy for the cell.…
| A plant cell is bounded by a cell wall and the living portion of the cell is within the walls and is divided into two portions: the nucleus, or central control center; and the cytoplasm, a fluid in which membrane bound organelles are found. Between the primary cell walls of adjacent plant cells, lies a pectic middle lamella. There can be a secondary cell wall which would be located just to the inside of the primary wall. Both walls consist mainly of cellulose, but the secondary cell wall may contain lignin and other substances. The outer boundary of the protoplasm (cytoplasm and nucleus) is a sandwich-like, flexible plasma membrane. This membrane regulates what enters and leaves the plant cell. Plant cell organelles include: endoplasmic reticulum, with and without ribosomes attached; Golgi bodies, mitochondria, and plastids. Plastids are chloroplasts, chromoplasts or leucoplasts—depending on the color and likewise the function. Chloroplasts are of specific interest to those…
We will need enough water from the marsh to fill all four tanks needed in the Elodea experiment as well as the beakers/tupperware containers in the Daphnia portion of the experiment. This is also true for the duckweed needed from Nahant Marsh: we will need to collect enough for both tests to our hypothesis which will be enough to treat two tanks with Elodea and half of the containers for Daphnia. Once all of these materials are collected we will create our tanks to observe the Elodea. All of the tanks will have 10 Elodea plants (for the sake of replication) in 1 inch of tank rocks and filled with the water from Nahant Marsh. The independent variable in this test will be whether or not the water in each tank will be treated by duckweed and whether or not the tank will have extra nutrients (1 inch of topsoil) added. The setup of the tanks is shown in Table 1 below. Each tank will be observed for 4 weeks. Then to replicate and observe more data we will go through the process again after cleaning the tanks and disposing of the materials from the previous data…
Powered by light, the green parts of plants produce organic compounds and O2 from CO2 and H2O.…
The common ancestor of plants was a green alga. The similarity of the members of these two groups can be demonstrated by their photosynthetic pigments (chlorophyll a and b,) carotenoids); chief storage product (starch); cellulose-rich cell walls (in some green algae only); and cell division by means of a cell plate (in certain green algae only).…