Answers edited by Room 204

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• What is the difference between pulmonary and systemic circulation?
  
• Question #5243b
  
• Why do cells need water?
  
• What is the difference between photosynthesis and cellular respiration?
  
• What are the two major forces that act on a star?
  
• What is a tissue?
  
• What is the LCD between #x/(x^2 - 81 )# and #(3x)/(x^2+18x +81)#?
  
• What is an animal that relies on interaction with the environment to help it control body temperature known as?
  
• What is the quadratic formula of #3x² + 10x – 2 = 0#?
  
• Why is salt sprinkled on icy roads and sidewalk?
  
• Given a consistent source of heat, about how much longer would it take to boil 100 g of water at 100°C than to melt 100 g of ice at 0°C?
  
• What are coincident lines?
  
• How do you solve #3x^2+7x-13=0#?
  
• What is the oxidation number of carbon in the salt sodium oxalate, #Na_2^(+)C_2O_4^(2-)#?
  
• How can I assign oxidation numbers to each of the atoms?
  
• How do you simplify #(-2a^7)(5a^-2)#?
  
• What does the mathematical expression 9 ∉ T mean?
  
• Why do plants need both chloroplasts and mitochondria?
  
• Which operation should you perform first when you simplify #63-(2+54*6)-:5#?
  
• How do you multiply #7(-2x+10)#?
  
• What is the chemical equation for cellular respiration?
  
• Question #477c1
  
• What is the scientific name for humans?
  
• Where in the human body does lactic acid build up?
  
• Is cooling hot water an exothermic process or an endothermic process?
  
• What is the Krebs Cycle?
  
• Apply collision theory to explain two reasons why increasing the temperature of a reaction by 10 K often doubles the reaction rate?
  
• How do I generate the electron configuration of iron?
  
• Question #0fe12
  
• Why is it easy to slip when there is water on the floor?
  
• How is blood pressure is measured?
  
• What is the sequence of all the structures that air passes through on its journey from the gas exchange surface of the lungs to the nose?
  
• How do you write the equation #tana=b# in the form of an inverse function?
  
• How do aldehydes affect bacteria?
  
• How many grams of hydrogen are necessary to react completely with 50.0 g of nitrogen in the reaction #N_2+3H_2->2NH_3#?
  
• What color light has the highest frequency?
  
• What does the metamorphosis of a frog involve?
  
• Except for helium, how many electrons do noble gases have in their outer energy levels?
  
• Question #068d6
  
• How do you simplify #(-3a^2)(2a^3)^2#?
  
• Question #f8cff
  
• What compounds are electrolytes?
  
• How does boiling point depend on pressure and temperature?
  
• What is #(27!)/((27-11)!11!)#?
  
• What would happen if the Earth's axis didn't tilt?
  
• What is the atomic number for hydrogen?
  
• Why does nondisjunction cause mutation?