Osmosis

Samples preparation and observation of egg activation and cell division The gametes used are from the species Strongylocentrotus purpuratus. Sea water containing unfertilized eggs was collected and four experimental conditions were applied. Before applying the treatments to the eggs, sea water was incubated in 16ºC water for 10 minutes. In the first experimental condition, 1mL of seawater was collected as a negative control. In the second experimental condition, 1µL of sperm was added to 1mL

Obtain a 30 cm by 11 cm container and place it on a flat surface large enough to fit it. On one end of the container, place 1 tablespoon of fish flakes. This will motivate the MHC to move to the other end. Obtain a balance scale and 15 pennies. Place the scale on a flat surface. Before starting, make sure the balance is zeroed. Then get 3 out of the 15 pennies and place them on the scale. Record the result. Add 3 more pennies to the 3 pennies on the scale (making it 6 pennies) then record the

The purpose of this experiment was to see if a penny could hold more drops of salt water or tap water. It was found that a penny could hold an average of 22.3 drops of tap water and only 20.8 drops of salt water. These results are consistent with the hypothesis: If the salt concentration of water impacts the amount of water a penny holds, then the penny will hold less drops with salt water. While dropping the water onto the penny, it was observed that the water formed into a dome-like shape on the

This experiment was focused on the effect that salt water has on bean plants, as opposed to tapwater. Specifically, does watering a plant with saltwater, instead of tap water make plants grow healthier or faster? It was hypothesised that if a plant is watered with only salt water, then the plant will not grow as well as one watered with tap water. During this experiment, The quantitative data that was collected included the plant height and the amount of salt that accumulated on the surface of the

4. EVALUATION AND CONCLUSION CONCLUSION The data did support my hypothesis as stating that the larger a cell is, the harder it is for diffusion to take place as the surface area to volume ratio decreases throughout evidence supported. There is a pattern in table 5 shows that, the surface area to volume ratio decreases when the agar jelly increases in size from 1cm to 3cm cube by a ratio of 6 to a ratio of 2, showing that average rate of diffusion which decreases as the size of the agar increases

Title The effect of temperature on Beta vulgaris plasma membrane permeability. Introduction Plasma membranes are the physical barrier of cells, which are selectively permeable to allow the passage of materials such as nutrients, gasses and waste products (Flinders University, 2015). The steroid cholesterol contained in the plasma membrane increases the membrane fluidity at higher temperatures (Blicher et al., 2009). Beta vulgaris contains a pigment called betalain, which leaches out of the tissue

In order to extract DNA from any living thing, we needed to first gather the materials. Then we began the experiment. Step 1, put in a blender 1/2 cup of split peas (100ml), 1/8 teaspoon table salt (less than 1ml), and 1 cup cold water (200ml). Next, we blended the materials on high for 15 seconds. This allowed the pea cells to separate from each other, so we now had a really thin pea-cell soup. Step 2, poured our thin pea-cell soup through a strainer into another container. Added 2 tablespoons of

Water Flowing Up The purpose of this lab was to figure out how capillary action affects the amount of H2O in a cup that is sucked up by a plant. The Hypothesis was: If the celery is placed in a cup of 100 mL of H2O and left to sit for 3 days, then the amount of H2O in the cup will decrease. This is because capillary action forces the H2O up the stem and into the leaves, where the H2O is used in photosynthesis to make sugar. There was no control and only experimental groups. The dependent

Purpose The purpose of this experiment was to explore how an organism’s internal environment is affected when exposed to different external environments, the eggs modeling humans. Testable Question How much will a shell-less egg change in mass if it is soaked in distilled water and Monster Energy Drink for 30 minutes? Hypothesis •If a shell-less egg is soaked in corn syrup for 30 minutes, then its mass will decrease by 3 grams. •If a shell-less egg is soaked in distilled water for

DESIGN Gravity makes objects fall down. In this experiment, with the help of gravity, water was poured down a conical beaker with different volume values and the time taken for all the water to empty the conical beaker was measured. In this experiment, the time measurements using Tracker software was stopped after the water reached the cylindrical part of the glass funnel. Research Question: How is the time taken for water to empty the conical glass funnel dependent on the volume of water? Independent