Biology osmosis observation

Unsaturated Fatty Acid legal -- print on different color paper than saturated fatty acid to accent difference.

Biology osmosis observation

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This allows students to focus on the process and techniques of investigation and the subsequent reporting. However, in Year 12 students are often given freedom to choose a topic or research question from the work covered over the whole of the course.

These "Open Inquiry" EEIs may provide more ownership, engagement and deeper understanding for the students but do place a bigger demand on resources and laboratory management. However, many teachers have found strategies to manage this should they choose to opt for a Open EEIs.

A Materials Requisition Form accompanies this document. My thanks to Biology teachers from Nanango for sharing this. Examples of Risk Assessment forms can be found in the tasks available on this page. A comprehensive form developed over several years by Urangan SHS can be found here: It is only an example and should not be assumed to necessarily meet the legal and safety obligations of any particular school or situation.

The method of artificial variation: The method of concomitant variation: This is also called a "correlation method". You can think that nature has manipulated the variables but it is still appropriate to class one as dependent and one as independent.

For example, do young leaves have the same density and distribution of stomata as older leaves; or how does temperature IV in a natural environment affect stoma opening DV? In this second case you do not need you to control the environmental temperature, but you do need to measure the DV at different temperatures.

The difficulty with the second approach is the control of other potentially influential variables such as humidity - as you have to take what you get. However, that does not preclude the variables in relationship being considered the IV and DV or being graphed as such.

One way to address the confounding variables eg humidity is to collect data on the other variable as well. You can run the statistics on each pair separately, but, for students who are not that "stats-savvy" then they could look for interactions between them at a visual level.

Food, as well as meeting the nutritional requirements of humans, will also meet the nutritional needs of a vast range of micro-organisms. These microbes will multiply rapidly in food, given the appropriate conditions such as temperature, pH and moisture.

The flavour, aroma and texture will ultimately be affected. Those most affected by food poisoning are the elderly, the young and immune suppressed individuals. A petri dish culture of the yeastlike organism fungus Candida krusei, after 10 days growth on dextrose agar. This species is known to be a food spoilage organism.

Dichloran Rose Bengal Chloramphenicol Agar is a commercially specialist culture medium for viable yeasts and moulds in food products. It incorporates Rose Bengal, which both helps limit colony size and is selective against bacteria.

Effects of different anti microbials on bacterial growth Joseph Lister first introduced aseptic surgery in when he used a spray of carbolic acid phenol C6H5OH as a germicide. Since then the control of growth by antimicrobial compounds has grown into a multi-billion dollar industry.

A good EEI is to assess the effect of a variety of antimicrobial disinfectants on bacterial growth. Our labbies prepare the plates and order in E. Small paper discs like out of a hole punch are sterilised and then soaked into different anti-microbials.

The discs are placed onto the agar plates and then into the incubator for a couple of days. If the anti bacterial is effective there is a clear ring around the disc where the E. Students have used the width of this ring to indicate effectiveness and to collect quantitative data.

Biology osmosis observation

The experiment can work quite well; keen students have then researched the active compounds within the antibiotic, how they act upon the bacteria and link to the results observed". No single disinfectant is ideal.Welcome!

Biology osmosis observation

Here you will find copies of most of the labs and activities that we perform in class. Some are only available from the AP Lab book, so I cannot post those online. Cheek Cell Lab – observe cheek cells under the microscope Cheek Cell Virtual Lab – virtual microscope view of cells. Plant Cell Lab – microscope observation of onion and elodea Plant Cell Lab Makeup – can be done at home or at the library Plant Cell Virtual Lab – use a virtual microscope to view plant cells..

Comparing Plant and Animal Cells – looks at cheek and onion cells. Biology laboratory work: Osmosis observation Measuring the dependence of net mass gain in potato pieces on concentration of sugar solution By Jonas Kulikauskas. Many of the suggestions below involve the use of animals.

Various laws apply to the use of animals in schools particularly any "live non-human vertebrate, that is fish, amphibians, reptiles, birds and mammals, encompassing domestic animals, purpose-bred animals, livestock, wildlife, and also cephalopods such as octopus and squid". Topic 1 Cell biology (revision notes summary for AQA GCSE Combined Science Trilogy: Biology Paper 1, Topic 1 "Cell biology") Know that cells are the basic unit of all forms of life and you should know how structural differences between types of cells enables them to perform specific functions within the organism.

CBSE class 11 biology covers the living world, biological classification, plant kingdom, animal kingdom, morphology of flowering plants, anatomy of flowering plants, structural organisation in animals, cell the unit of life, biomolecules, cell cycle and cell division, transport in plants, mineral nutrition, photosynthesis in higher plants, respiration in .

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