Bushra Hanaif Professor Kristen Przyborski BI 121-02 April 14‚ 2013 1) In the 1940s‚ some physicians prescribed low doses of a drug called dinitrophenol (DNP) to help patients lose weight. This unsafe method was abandoned after a few patients died. DNP uncouples the chemiosmotic machinery by making the lipid bilayer of the inner mitochondrial membrane leaky to H+. Explain how this can cause weight loss. In a coupled reaction‚ an exergonic reaction provides the energy needed to drive an endergonic
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Biology Assessment #4 Australian Megafauna: Thylacoleo Carnifex & Diprotodon Optatum Part A: The term Megafauna means ‘big animals’‚ and refers to animals with a body mass of over 40 kilograms. In general use‚ the term Megafauna is used to refer to the animals that evolved after the dinosaurs became extinct 65 million years ago. The extinction of the dinosaurs meant that the large number of birds‚ mammals and reptiles‚ which were left over‚ were able to evolve and dominate the earth.
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Urinary System: Anatomy Review 1. Name the organs in the urinary system: 1. 2 kidneys 2. 2 ureters 3. bladder 4. uethra 2. The kidneys are retroperitoneal (behind the peritoneum)‚ lying against the dorsal body wall in the upper abdomen. 3. The adrenal gland sits atop the kidneys. Blood vessels enter and leave the kidney at the renal cortex. 4. The functional units of the kidney are the nephrons. They are called renal pyramids if they are located mainly in the cortex. They are called renal
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Water molecules move from high to low Osmosis is what they seem to know Solute and Solvent are what’s inside The polarity of water makes it easy to find “Hyper” and “Hypo” tells you how much is there But isotonic means that they are fair Water molecules move from the inside out Scientists call this plasmolysis without a doubt All of this happens inside a membrane It is a serious matter‚ not a fun little game When a membrane is selective it chooses what it wants Few things are moved through
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Scientific Writing and Standard Components of a Lab Report INTRODUCTION Writing is a powerful tool. Effective communication is necessary to succeed in any field. As a professional‚ you must communicate with both your colleagues‚ and the community at large. Writing is the means of showing the value of your work. The specific style of writing in science is based on the unique audience of readers. In addition‚ writing allows one to organize one’s thoughts and clarify ideas‚ and it fosters abstract
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Introduction: Plant growth occurs throughout its life in a process known as indeterminate growth. This type of growth is capable because of the apical meristem and the lateral meristem. Meristem refers to a specialized section of plant tissue characterized by cell division and growth. Much of the mature plant ’s growth is provided by meristems in nature. And typically‚ Apical meristems found at the tips of stems and roots while lateral‚ or secondary‚ meristems found just under the surface along
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Introduction “Micro” refers to tiny‚ “scope” refers to view or look at. Microscope is the major tool of biologists‚ an optical instrument that uses lens or combination of lens to produce magnified images that are too small to seen by unaided eye. Microscope provides the enlarged view that helps in examining and analyzing the image. Through the use of microscope ‚ knowledge of cell structure was gained and one of the fundamental theories of biology‚ the Cell Theory was developed.
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Review Questions 3. Animals benefit from the relationship with plants because they are able to get rewards such as pollen and nectar. With these they have the ability to continue on with their daily work. Applying Your Knowledge 1. The rise in prominence of one major group does not necessarily result in the total replacement of a previously dominant group because one group may work better in the part than the other group. Gymnosperms for example produce excess amount of pollen‚ they are
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Salmonella (eubacteria) Life Cycle(s) and Reproduction * http://salmonellies.blogspot.ca/2011/11/life-cycle.html L -in order for salmonella to reproduce or survive‚ it must have a host -only certain strains of salmonella bacteria can life for a semi-long period outside a host body -once salmonella has entered the body (through contaminated foods or coming in contact with infected feces) the bacteria will begin to grow R -salmonella reproduces asexually through binary fission Binary fission-
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Experiment 9/5 Voltaic cells AIM How the change the concentration of the electrolyte CuSo4 (solution of ions) affect the voltage of the electrochemical cell BACKGROUND An electrochemical cell is also called a voltaic cell‚ which derives electrical energy from redox reaction taking place within the cell. It consists of two different metals that are connected by a salt bridge. Eletrons always flow from anode to cathode‚ where anode is negative (reduction) and cathode is positive (oxidation)
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