ipl-logo

Paramecium Lab Report

496 Words2 Pages

The control experiment showed the average velocity of paramecium remain around 90.00 µms-1 throughout the 1800 seconds, due to the large groups of cilia on the surface of paramecium which beat simultaneously in a controlled, coordinated motion allowing them to maintain a steady velocity. Figure One shows that in the presence of Toxin A, Nickel, the average velocity of the paramecium begins at 80.00 µms-1, slightly lower than that of the control experiment, and decreases gradually until 1800 seconds to 0 µms-1. Studies have shown that nickel at concentrations above 0.1mM inhibits ciliary activity and subsequently stops the movement of paramecium (Larsen and Satir, 1991). The data in Figures 4 and 1 support this conclusion as in the presence …show more content…

The velocity then decreased rapidly until 1440 seconds, when the average velocity reached 0. The presence of alcohol reduced the velocity at a faster rate than nickel, as the average velocity reached 0µms-1 at 1440 seconds in comparison to 1800 seconds in the presence of nickel. It can be inferenced from Figure Two that alcohol also has a negative effect on the cilia of paramecium as the average velocity was again greatly decreased in comparison to that of the control. When exposed to high concentrations of alcohol cilia movement is decreased, yet is stimulated at low concentrations (Sisson, 2007). This is consistent with the data presented in Figure Two as when exposed to the alcohol at a high concentration of 10M, velocity decreased. As shown in Figure 5, the number of stationary paramecium increased over time to a peak 25 stationary paramecium at 1800 seconds. However, this is less than under exposure to Nickel, in which reached there is a peak of 29 stationary paramecium after 1800 seconds. Therefore, Nickel caused there to be more stationary paramecium than

Show More
Related
739 Words | 3 Pages

The process for this portion of the experiment was identical for all fourteen replicates. Ten daphnia, all at age 3, were placed in beakers of water

Read More
1275 Words | 6 Pages

Record this information at the end of every minute for ten minutes, in Table 1. For the second part of the experiment, using the pipette and water, place the water on the filter paper on one side of the behavior tray. Allow the filter paper to absorb the water therefore creating the wet environment. Next, place the Pill Bugs in the behavior tray and observe the amount of

Read More
255 Words | 2 Pages

Caffeine, Nicotine, ethanol, and a control solution were tested. The heart rate of Daphnia was measured after exposure to each of the chemicals. After testing, it was found that ethanol depressed the heart rate while exposed, but the heart rate stabilized after exposure. With exposure to nicotine, the heart rate increased by 20%. If more nicotine was added, the effects were varied and sometimes irreversible.

Read More
572 Words | 3 Pages

This question requires knowing the Beadle and Tatum’s experiment with Neurospora crassa and the results. Neurospora crassa, which is a type of bread mold of the phylum Ascomycota, has provided a rich source of knowledge on “biosynthetic pathways.” Neurospora crassa was perfect substance for biosynthetic pathway experiment. Because it was cheap, easy to grow, and more importantly it is haploid for most of its life. Since Neurospora crassa is haploid, there exists only one copy of each gene so that researchers don’t need to consider about dominant and recessive alleles.

Read More
620 Words | 3 Pages

The following experiment determines the effects of 50 ml tobacco extract on the heart rate of a crustaceans Daphnia Magna. Daphnia represents a small group of aquatic crustaceans, also known as “water fleas”, with clear exoskeletons, which makes studying their heart rate effortlessly. The heart rate can be observed using a microscope and counted under varying conditions. (Pritchard, J. B.) In this case, changing the type and concentration of natural plant substances reveals the effects of the plant defense mechanisms on the specimen of Daphnia Magna.

Read More
637 Words | 3 Pages

Different groups of bed bugs were offered 3%, 1%, 0.1%, and 10% of NaCl solutions, however, none of the bugs reacted to the 10% solution. The 3% NaCl solution was engorged the most by male bed bugs. Which we can say that bed bugs are fastidious insects, because the higher percentage of the solution the bed bugs will not have the ability to survive. Same concept goes with the lower percentage of the solution. Bed bugs do not react fully when offered a low percentage of solution, therefore, the bug would rather engorge on a solution with a medium percentage.

Read More
450 Words | 2 Pages

The same worm (for a control variable) was placed in a forty percent mixture of Pau D’Arco (independent variable) and water for ninety seconds. Then, the worm’s heart rate (dependant variable) was recorded as before on a slide with beats per thirty seconds. As a result, the hypothesis

Read More
494 Words | 2 Pages

Respiratory System Diffusion Lab 1. Describe the changes that occurred to the salt and to the potato Numerous changes occurred to the salt and potato from the start to end of the experiment. At the starting of the experiment, the mass of the potato was 16.4 grams; while at the end the mass decreased, by 1.4 grams, to give a mass of 15.0 grams. Also, at the starting, the salt was completely white and was completely dry, at the end though the salt became wet, soggy and changed in color to yellow. Lastly, the salt on the potato spread out and not a lot of salt was found on the potato compared to the start of the experiment.

Read More
1078 Words | 5 Pages

Introduction: All living organisms require oxygen to grow. Daphnia magna and Lemna minor (also known as Duckweed in its most common form) are no exceptions to this rule. Fertilizer is used to help plants, like Lemna minor grow. Plants give off the oxygen that other organisms, such as Daphnia magna, need. However, over-oxygenated environments can cause excess in the plant life.

Read More
440 Words | 2 Pages

When testing the effects of hydrochloric acid on different solutions data was collected that showed that liver cells have a buffer and celery do not which supports the original hypothesis of liver cells containing a buffer. A buffer is a solution that resists change in pH when acid is added to it. A buffer will release more hydroxide ions when there is acid added. Each solution in the lab was tested first at its original pH and then after five drops each was tested until there were 30 drops added in. When tested in the lab two controls were used one positive for having a buffer (alka seltzer) and one negative (water).

Read More
836 Words | 4 Pages

Nicholas Hack-Irvin Bio 104-06 October 25, 2015 Earthworm Response to Spicebush Methods: Using a plastic container lined with wax paper, two pieces of construction paper were cut to each fit the width of the box. These two pieces of construction paper were placed in close proximity to each other to ensure that both sensory feedbacks would be noticeable to the earthworm when placed in between the two pieces of paper. One strip of paper was lightly covered in water, where the other piece of paper was lightly covered in spicebush extract. 10 replications were performed where a different worm was placed in the center of the container each time, equidistant from both pieces of construction paper, and observed to see whether it would move towards

Read More
349 Words | 2 Pages

Experimental procedure (real life) Complete the ‘experimental setup’ for the guinea pig ilium experiment as shown in Fig 1. The agonist, acetylcholine is added to the organ bath at a concentration of 1 x 10⁻⁸ M where it will follow the 3 minute cycle. After 30 seconds the results are recorded. After results are recorded, washing of the organ bath and ilium is conducted (note. Called wash out).

Read More
341 Words | 2 Pages

Stimulants increased the worms’ pulsation rate during the experiment. b) After the comparison of data, I found that the mean pulsation rate for the worms suspended in alcohol was slightly lower than the pulsation rate of the same worm before contact with the drug. After contact with the alcohol the mean change of pulsation rate ranged from -2 to 2, with the average result being 0. These shows use that that alcohol did decrease some of the worms’ pulsation

Read More
463 Words | 2 Pages

The density of the penny was 4.68 g/cm3 before the experiment and 4.43 g/cm3 at the end of the experiment. The density of gold, though, is 19.3 g/cm3. Since the densities of the penny and the gold are different, the penny clearly did not change into another element. The gold color of the penny was a result of the flame that it was held above melting the zinc that it was coated in with the original bronze colored coating of the penny, creating an alloy with a shiny yellow color. Since neither of the pennies, silver colored or gold, changed densities throughout the experiment and each retained their own properties; the properties of copper; no new elements were

Read More
587 Words | 3 Pages

The idea of the experiment is to introduce the purpose of meiosis. Meiosis’s purpose is to produce the gametes of sperm and eggs, by making the daughter cells end up with exactly half of the chromosomes as the starting cell. A division process that turns diploid cells to haploid cells, in other words, take two sets of chromosomes to make a single set of chromosomes. As a result, when a sperm and egg join in fertilization, a genome is form. Meiosis has a two-step division process called meiosis I and meiosis II.

Read More

More about Paramecium Lab Report

Open Document