Over these 15 consecutive days our criminal justice class has watched the decomposition of 9 still born piglets, which were laid out in a specific way, with specific wounds. Piglet 10 was put into a box at the beginning of the experiment, and was not revealed until the end of it. Each piglet was in its own condition. Piglet 0 was naked in a box, Piglet 1 was naked on the grass, piglet 2 had 1st, 2nd, and 3rd degree burn all over its body, it too was laying on the grass, piglet 3 was stabbed behind right shoulder, also lying on the grass, piglet 4 had a .380 bullet would on its side, it was laying on the grass, piglet 5 was clothed on the grass, piglet 6 was naked piglet on the black top, piglet 7 was clothed on the black top, piglet 8 was suspended in the air with clothes on, and piglet 9 was suspended in the air naked. At the beginning of the experiment we hypothesized on theories we now know the answer too.
Part A: Osmosis practical task Aim: To observe the effects of osmosis in rhubarb cells. Hypothesis: Water will be extracted out of the cells in the salt solution causing the cells to look different to the cells in the freshwater solution. Materials: Rhubarb Distilled water in a dropping bottle Salt solution in a dropping bottle Microscope, slides, and coverslips Forceps and razor blades or scalpel Paper Towel Method: Clean and dry a slide and coverslip.
The unit we just concluded is called Bees. Bees was all about finding the area of shapes, using trigonometric functions and/or the Pythagorean theorem to find the side length(s) of a triangle, using trigonometric inverses to find the angles of a triangle, using triangles to see what polygon has the largest area when the perimeter of the polygons was 300 feet, and finding the volume, surface area, and lateral surface area of three dimensional prisms. A polygon is a two dimensional figure with at least three straight sides. Perimeter is the distance around a polygon. To find the perimeter of a shape, you need to add the lengths of all the sides of the shape.
This was calculated using the C1V1=C2V2 formula. A photo spectrometer was used to measure, in arbitrary units, the change in membrane permeability of the B. Vulgaris cells. To begin, the B. Vulgaris samples were put into vials containing the distilled water, 40% and 70% Ethanol
The membrane permeability of Beta vulgaris is affected by ethanol solution Introduction Cell membranes are the semi-permeable membrane that surrounds all cells. It separates the extracellular environment from the intercellular environment. It is a phospholipid bilayer which contains various proteins, lipids and carbohydrates all serving different purposes. It is this structure which allows for the transport of nutrients, proteins and water. (Nature.com, 2014).
A possible explanation for why there was no mitochondrial activity observed in the boiled corn kernels might be because increasing the temperature would disintegrate dehydrogenases and thus they wouldn't function as efficient or they
Student number Unit code Assessment number Word count Background to the Mitotic Cell Cycle All living organisms have several mechanisms that allow cell survival/ life continuity and reproduction. A major role in eukaryotic survival is attached to the cell cycle. It comprises of 2 major phases and in a typical human cell it lasts for approximately 24 hours.
For this lab I will be using water and sucrose to demonstrate the rate of osmosis. In this lab I will be exploring how temperature impacts the rate of osmosis by placing pieces of potato of equal size in solutions of different temperatures and observing the change in mass of potato after a given period of time. The change in mass will indicate the rate of osmosis.
RESTING MEMBRANE POTENTIAL When the neuron is not sending a signal at rest the membrane potential called as resting membrane potential. In this stage, permeability of K+ much greater than Na+ When a neuron is at rest, the inside of the neuron is negative relative to the outside. Although the concentrations of the different ions endeavor to balance out on both sides of the membrane, they cannot because the cell membrane sanctions only some ions to pass through channels (ion channels). At rest, potassium ions (K+) can cross through the membrane facilely. Additionally at rest, chloride ions (Cl-) and sodium ions (Na+) have a more arduous time crossing.
In this report, I will discuss cells and the function along with the structure for each of these processes. I will also discuss the process of osmosis, mitosis, also the process of differentiation, alongside how cancer cells configure. There are many differences between a prokaryotic cell and a eukaryotic cell, the main identifiable differences being that a eukaryotic cell has a nucleus whereas the eukaryotic cell lives in living things such as animals, and plants. Another main difference between the two cells is the presence of other membrane, organelles such as mitochondria. A membrane- bound organelle is an organised and specialised structure found in a living cell only these includes.
By using the same mass of potato slices and putting them in different concentration of solutions for a specific amount of time will tell us how the concentration changes the mass of the potato slice. Therefore changing the rate of osmosis. Hypothesis: I predict that, if the piece of potato was put into a solution that has a high concretion of sucrose then the potato slice would lose mass as it would lose water from its cells because the water is moving out of the cell from a high concentration to a low concentration of water through a semi- permeable membrane. The cell is hypotonic and the solution is hypertonic.
The Downfall of Bees Nearly everyone loves coffee and chocolate, but not everybody knows how much bees help in the process of coffee beans and chocolate. Without the bees, we wouldn 't have the crops that are pollinated by them, we would only have wind pollinated crops like wheat. The only way that the bees population can be restored is if we all get the more of the world aware of how serious this issue is. Most people know that the bees are dying, but they don 't know why and how we can stop the rapid decrease of honeybees.
When you are little, you learn that bees are important to maintaining our flowers and are the creators of the honey we eat. Bees are small insects and people tend to hate them because it hurts when you get stung by one, but have you ever thought about the impact our planet would have if our bee population started to decrease or even became extinct? Because flowers and honey aren 't the only thing that would be affected by losing a big number in the bee’s population. The scientific term used for the decreasing population of bees is called Colony Collapse Disorder (CCD). This has been an ongoing problem and the numbers are dying fast.
Biology Design Practical Joshua Edwards What are effects of the volume of a potato and the amount of weight it loses when placed in salt solution? Introduction This design practical uses a potato’s surface area to volume ratio to see what affects it has on osmosis in different concentrations. Osmosis is the movement of water molecules through a cell membrane into an area of a higher solute concentration. The movement goes the way of the solvent with more solute because the lower solute concentration is drifting through balancing the ratio of solute per solvent (En.wikipedia.org, 2018).
What is the effect of temperatures 10°C , 20°C, 40°C, 60°C and 70°C ± 1/°C on yeast fermentation when baking bread? ii. Aim: The focal aim of this experiment is to investigate the effect that temperature has on the growth and respiration of yeast (Saccharomyces cerevisiae) fermentation. iii.
