Abstract: In this study of researching animals and their behaviors, demonstrates the behaviors of sow bugs and their likeness to dry vs. moist and light vs. shade preference. The general hypothesis for this experiment was that the sow bugs would prefer the shade vs. the light, and the moist climate vs. the dry climate. In this experiment, six sow bugs were obtained in a petri dish lined with filter paper that was taped to keep the bugs from escaping. Three different trials were completed by first covering half the petri dish with a piece of construction paper and the other half left uncovered in the presence of light. The second trial completed was covering half the filter paper with drops of water to present moisture, and dry on the other half, both in the presence of light.
This soil is referred to as vermicast, or worm manure that can be used as a fertilizer for planting. Vermicast has been shown to have a reduced number of contaminants and an increased number of nutrients. In a previous study, the effects of vermicast composting were applied to Amashito peppers versus regular soil. The experiment resulted in a significant difference in plant height, mass, and leaf count when the peppers were planted in vermicast. While this isn’t technically observing the benefits of added worms, it does show that worms alter the soil in a way that aids in plant growth.
Using a plastic cup try to pour water on the eye from the tear duct outwards. If the foreign body remains after this, seek professional help. If you can see the foreign object in the ear and can remove it easily, carefully remove it with a pair of tweezers, trying not to push the foreign body further in the ear. Tilt the head to help the object to fall out by itself. If the foreign body is a live insect, you can kill it by putting a few drops of baby oil or vegetable oil in the ear.
Yersinia Pestis, as clear from its name, wa s a pest for the society! Although it biologically belongs to phylum ‘proteobacteria’, ancestor of mitochondria (power plant of the eukaryote cell), wasn’t life evolving but depleting! Yersinia Pestis is an anaerobic, gram-negative, rod-shaped coccobaccilus bacteria which enjoys hunting animals, especially the social one. This microbe is non-motile but, sadly, it has vectors, which help it commute to humans. Oriental Rat Flea is the true vector of it that lives over rats.
This initial exposure causes sensitization and it is the subsequent exposures that elicit the damaging immune responses that is recognized as the disease. There is some diversity in allergic responses depending on the immunological effector pathways elicited (6). Delayed hypersensitivity,
IBDP HL BIOLOGY - PRACTICAL 3 The colour of Beetroot is due to the presence of a red pigment, betacyanin in the cell sap. As long as the cells and their membranes are intact (that is not damaged), the betacyanin remains inside the vacuoles in the cells. However, if the membranes are stressed or damaged, betacyanin will leak through the membranes and produce a red colour in the water surrounding the beet tissue. The intensity of this red colour will allow for the assessment of the damage produced by experimental treatment 1) Aim To investigate the effect of temperature on cell membranes in beetroot (Beta vulgaris) 2) Research Question How does the temperature of the water bath (30 °C, 40°C, 50°C, 60°C, 70°C) affect the absorbance reading and the amount of the betacyanin that leaks out of the cell membrane when factors like duration of experiment, number of discs of beetroot used, surface area of each discs and volume of water are kept constant? 3) Hypothesis My hypothesis is that the greater the temperature, the more betacyanin will leak out of the cell through the cell membrane as the cell membranes will be under more stress and be more damaged, the higher temperature will also result in a faster rate of diffusion.
Question If pill bugs were given the choice, would they prefer a light environment or a dark environment? Background Many people are familiar with the “roly poly”, a pest that can be found all around the country. This species is actually known as the pill bug or scientifically known as Armadillium vulgare. They belong in the Anamalia kingdom, and the Arthropoda phylum. Their class is Malacostraca, and order is Isopoda.
a) Which process is responsible for the distribution of these chemicals through the air? Diffusion b) If a moth detects pheromones, how might it work out which direction they are coming from? Detect the higher concentration of pheromones c) What would be the advantage of a moth releasing the pheromones on a night when there was little wind? The pheromones arent blown away from a potential mate 5a. Osmosis is the diffusion of water across a semi permeable membrane.
Results There were notable differences between each test. Figure 2 demonstrates the actual results of the three separate experimental tests. The error bars suggest that there could be significance in the results but closer examination of the statistical data suggests otherwise. Table one compares the values of the statistical tests for each experiment. The phototaxis experiment resulted in a higher number of Armadillidium vulgare found in the light side of the experimental environment than in the dark side of the
DDT also known as dichloro-diphenly-trichloroethane is an organochlorine insecticide which is a white, crystalline solid, tasteless, almost odorless and was discovered in 1939 by Paul Hermann Muller. The synthetic chemical compound that was made in a laboratory can’t be dissolved in water however it is easily dissolved in organic solvents such as fats and oils. As a tendency to dissolve in fats, DDT can build up in the fatty tissues of animals that are out in the open. Amass build up, known as bioaccumulation, EPA described DDT as a persistent toxin because if it remains in certain sea creatures and the levels are often the highest in the body of animals near to the top of the food chain. Some people claim that DDT can cause serious health effects on humans such as liver cancer, nervous system damage, birth defects and other reproductive.