The Size Of An Organism

Cells and molecules in the environment are constantly moving and changing, for cells to function properly there is a need for equilibrium to be met. The size of the cell and the solution outside of the cell affects the rate of diffusion and osmosis in the cell. Cells are constantly trying to reach an equilibrium with the molecules and substances around it, which is why there are such terms as: hypertonic, hypotonic and isotonic. The procedures allowed testing of whether or not surface area or volume increased diffusion and how different substance control diffusion. Cells are constantly moving to reach equilibrium through diffusion and osmosis.

2. Define multicellular organism - are those organisms containing more than one cell, and having differentiated cells that perform various functions.

Research Question: How does the size of the cell affect its efficiency in exchanging substances through several ways, like diffusion?

Another reason that larger organisms have lower population densities than smaller organisms is that many large organisms depend on small ones as their food source. Thus, there would have to be significantly less of these large organisms than the small ones for both these populations to survive.

Most micro-organisms need most of the things you and I need to flourish and grow - moisture, warmth and a source of nutrition - some (usually the most dangerous such as those responsible for some types of gangrene) can do without oxygen (anaerobic bacteria). They need a mode of spread (usually the unwashed or poorly washed hands of people or badly cleaned equipment/facilities or badly stored food) and a vulnerable person to invade.

contrast the reasons cell division is important for unicellular and multicellular organisms. Cell division is the method in which single celled organisms reproduce. Cell division allows multi-cellular to grow and repair dead or damaged cells

1) The relationship between the rate of diffusion, volume and surface area is that the surface area of a subject somewhat correlates with the volume of the object. When the surface area and volume are set up as a ratio, this gives a good idea as to how fast the rate of diffusion will be. The higher surface area to volume ratio, the faster the rate of diffusion. This is because then there is more surfaces to diffuse through and there materials to diffuse, the rate of diffusion is a lot faster. Conversely, when there is a smaller surface area for more molecules to diffuse through, the rate of diffusion will be lower.

Q2. Cell growth depends on nutrient uptake and waste disposal. You might imagine, therefore, that the rate of movement of nutrients and waste products across the cell membrane would be an important determinant of the rate of cell growth. Is there a correlation between a cell 's growth rate and its surface—to—volume ratio?

How does biology affect a person’s daily life?: Every day, biologists look into matters that influence you and the way you live. They specify which foods are healthy, study how much a person should exercise, how one can evade getting ill, and what your air, land, and food supply will be like in the close future.

▪ Surface area to volume ratios and the ability of cells to get nutrients in and waste products out of the cell

A) Heat is an effective means of sterilization because it destroys the proteins of microbial

The rate of enzyme-catalyzed reaction increases as the temperature is raised (). An increase of temperature by 1-2 degrees may introduce changes of 10%-20% in the results. As the temperature increases the kinetic energy that molecules possess increases as well. This results in more random collisions of substrate and enzymes increasing rate of the chemical reaction, more product is formed (6). The metabolic rate of an organism increases, hence it develops faster. However metabolic activity of the larvae cannot be responsible for high mass temperatures which affect larval development. The heat produced by larvae is normally heat to regulate body temperature.

Finally there is the Hyperthermophiles. Found in very hot temperatures such as hydrothermal vents in deep oceans. With this said, the two microorganisms that I worked with would be known as Mesophiles. Both of these microorganisms grow on or in the human body. They prefer moist heat that is body temperature. I made an incubation box to help mimic the temperatures needed. Typically trying to maintain the temperature of thirty seven degrees Celsius.

All organisms require a large surface area in their gas exchange system, having a larger surface area to volume ratio increases the efficiency on gas exchange. Each of the 3 organisms, diving mammal, fish and aquatic insects all have a large surface area and have different ways of increasing this. Diving mammals increase their surface area by folding the tissue on the alveoli of the gas exchange mechanism fold back on itself, these fold in the alveoli increase the surface area. Fish have filaments and lamellae in the gills which are very long and thing increasing the surface area to volume ratio. The filaments in the gills fold copious times and then the lamellae found inside the filaments also found numerous times increasing the surface area

Sponges are creatures that many people do really take about, but the truth is that they are fascinating. They are simple compared to many creatures on this planet, but such a simple creature can have intriguing ways to function in life. They have so many different structures that help collect food and allow water flow. Also, there are a few different morphologies that they can take advantage of to survive. One of the most important factor to a sponge’s survival is the water flow velocity to area ratio.