Grade Master

Biology The Origin of Life-Questions and Answers Graded A+ Life on earth date of origin - ANSWER-between 3.5 and 4 billion years ago Fist living creatures - ANSWER-Prokariotic-like; supported by the fossil record Spontaneous generation (definition) - ANSWER-The origin hypothesis where organisms come to life directly from non-living matter Spontaneous generation (origin) - ANSWER-Origin hypothesis created by Greek philosophers; Aristotle believed that life arose from "slime". Dis-p...

IGCSE Business: Analysis of Accounts-Questions and Answers Graded A+ What do businesses analyse their accounts? - ANSWER-1. Identify strength and weaknesses as well as the strategies to deal with it. 2. Check if the business meets its objective. 3. Improve future business performance The margins that measure business's profitability are: - ANSWER-1. Gross profit margin 2. Profit margin 3. Return on Capital Emplyoed Gross profit margin - ANSWER-shows how much gross profit is earned ...

World War 1-Questions and Answers Graded A+ Causes of World War I - ANSWER-nationalism, imperialism, militarism, creation of alliances (Central and Allied Powers); immediate cause: assassination of Archduke Francis Ferdinand (heir to Austrian throne) by a Serb on June 28, 1914 Triple Alliance, Triple Entente - ANSWER-the triple alliance was made up of germany, italy, and austria hungary and the triple entente was made up of russia france and great britain. Italy eventually switched sides t...

Human Physiology of the Kidney-Questions and Answers Graded A+

Human Biology: Urinary System-Questions and Answers Graded A+ Organ system that plays a major role in maintaining the salt, water, and pH balance in the blood - ANSWER-Urinary System A waste product of amino acid metabolism - ANSWER-Urea A hormone released by the kidneys that regulates the production of red blood cells - ANSWER-Erythropoietin (EPO) Transports blood into the kidneys - ANSWER-Renal Artery Transports blood out of the kidneys - ANSWER-Renal Vein Transports urine fr...

Human Physiology of the Kidney-Questions and Answers Graded A+ The urinary system includes - ANSWER-kidneys, ureters, urinary bladder, urethra The urinary system doesn't include: - ANSWER-adrenal glands Which of the following waste products excreted in urine is the result of metabolic reactions in muscle cells - ANSWER-creatinine What is normally excreted in the urine? - ANSWER-vitamins, drugs, excess ions, uric acid, urea, creatinine Which of the following is not normally excret...

Biochemistry - Folic Acid and B12-Questions and Answers Graded A+ What are dietary sources of Vitamin B12? - ANSWER-Meats Shellfish Poultry Eggs Dairy products Which two reactions require Vitamin B12? - ANSWER-Homocysteine -> Methoinine (homocysteine N-methyltransferase/methionine synthase) Isomerization of methyl malonyl CoA (methylmalonyl-CoA mutase) What are the two reactions that require S-Adenosylmethionine (SAM)? - ANSWER-Norepinephrine -> Epinephrine Homocysteine -...

Thermodynamics Exam 1-Questions and Answers Graded A+

Thermodynamics (Chapter 12)-Questions and Answers Graded A+ Thermodynamics - ANSWER-The study of energy and its transformation from one form to another. Thermochemistry - ANSWER-The study of the relation between chemical reactions and changes in energy. -The energy associated with chemical reactions. -Thermochemical equation: describes a chemical rxn. (ex: 2H2 + O2 -> 2H2O Thermochemical Equilibrium - ANSWER-A condition in which temperature is uniform throughout a material. -Tempe...

Thermodynamics Exam 1-Questions and Answers Graded A+ Thermodynamics - ANSWER-The study of motion of heat and its effect on surroundings System - ANSWER-Something of interest to our study Surrounding - ANSWER-Everything external to the system Boundary - ANSWER-Separates the system from its surroundings Closed System - ANSWER--mass is constant -could have heat or work interactions -closed to mass flow Isolated System - ANSWER-(special case of closed system) -Does not interact...