Paramecium

Paramecium is part of the Alveolata clade, which are heterotrophs and a major clade that belogs to the kingdom Protista. Paramecium are single-celled organisms with an oval, slipper shaped. On the outside of the Paramecium you can find the radiatin canal and a contractile vacuole. The cytoplasm, food vacuoles, the macronucleus, and the micronucleus are located inside. Another characteristic of them is that they move faster than other protists. They live in aquatic environments, but most usual in warm water. Paramecium uses the process phagocytosis to capture their prey. It likes to eat bacteria, dead plant, algae and animal matter. They are able to do sexual and asexual reproduction. Sexual reproduction occurs only under stressful conditions by a process called conjugation. In the other hand asexual reproduction is the most common, but is accomplished by transverse binary fission. Paramecium also plays an important role in the carbon cycle since the bacteria they eat are found in decaying plants.…

Furthermore, the purpose of this laboratory exercise is to conduct an experiment as to why the two species of Paramecium Aurelia(Pa) and Paramecium Caudatum(Pc) would not habitually coexist in an environment. The observation was that the two species flourish when they were grown separately and in the mixed beaker, Pa thrived while Pc lessened. The population dynamics or changes in the size of population over time, included carrying capacity and important graph shaped curves. Carrying capacity…

Through the practical, it was possible to determine the effect of certain toxins on ciliary movement using paramecium as an organism model. As Figure 1 shows, all the toxins have a different effect on paramecium velocity and therefore on ciliary activity. According to Fig. 1 paramecium speed is inversely proportional to time. After the addition of Ni2+ (toxin A) at approximately 0.1Mm (0.099), the velocity of paramecium decreased gradually until it fully stopped after 1800 seconds (Fig. 1). It…

1, the growth of Paramecium aurelia fits the curve of the logistic population growth because they have limited resources as the intraspecific competition, influencing negatively on fitness for both individuals. From Day 0 to Day 12, with unlimited resource, Paramecium aurelia is at the acceleration phase, more growing cells than dead cells. Day 12 where the inflection point is indicates the growth rate changes to constant. After Day 12 and until Day 14, the growth enters the deceleration phase…

Paramecia, unicellular cilliated protozoa, usually are ovoid and elongated. They widespread in brackish environments and freshwater. Length of the species are various ranging from 50 micrometers to 330 micrometers. They feed on yeasts, algae, and small protozoa which are captured by them through phagocytosis, devouring a particle by “wrapping pseudopodia around it and packaging it within a food vacuole” (Campbell and Reece 2011). They also serve as the models for the study of basic biological…

Paramecium is a single-celled protist from the Alveolate clade. They live in wet environments like lakes, ponds, streams, rivers, and puddles. The wet environment can even be inside of animal bodies and in moist soil. Paramecium are heterotrophs, meaning they eat other living or non-living things. They eat by trapping food inside of their oral grooves, which are basically mouths. They use cilia on their body to not only move, but also help capture their prey. When the food gets into the oral…

How variable were the lengths of Paramecium caudatum cells relative to the lengths and widths of the cells you observed in Elodea leaves? • The lengths of the Paramecium caudatum in comparison to the lengths of the Elodea leaves, were actually pretty similar. The Paramecium caudatum were rounder in shape, and kind of skinny, while the Elodea leaves were a little wider and squarer in shape. But in overall length, they were pretty similar, however, the Elodea leaves varied more in length than did…

The Didinium was the predator and preyed on the Colpidium and the Paramecium which are both swimming bacterivores. The 240 ml capped bottles were used as the miniature community features of something much larger known as microcosms. The bottles had two wheat seeds and 100 ml of nutrient medium. The medium was made up of .55 g of protozoan pellet and a liter of well water (Jiang and Kulczycki, 2004). These were autoclaved by being put in a high pressure chamber with high pressure saturated steam.…

(a) The Paramecium population in the lab (graph a) appears to have a logistical population growth. Visually, the data and trend line of the graph create an S-shaped curve, which is the shape of a logistical population growth. A logistical population growth is a population growth that initially occurs at a constant rate of increase over time, but then levels out as the carrying capacity of the environment is approached. For 10 days the population increases at a steady rate. However, after day 10…

Yong, Ed. “Fish Watches Food. Scientists Watch Fish’s Thoughts”. National Geographic 31 January 2013, 1-2. In the article "Fish Watches Food. Scientists Watch Fish’s Thoughts”, by Ed Yong, Japanese scientists modified a larval zebrafish’s neurons to produce a bright green glow whenever they fire by injecting a jellyfish protein called GFP which gives a bright green glow when neurons pass signals to one another allowing the scientists to see its brain activity. Since larval zebrafishes’ bodies…