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Eleventh Grade (Grade 11) Science Questions

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Grade 11 Biochemical Pathways
Which of the following best summarizes photosynthesis?
  1. H2O+ CO2 + sunlight ------> O2 + glucose
  2. H2O + O2 + sunlight -------> CO2 + glucose
  3. O2 + glucose -------> H2O + CO2 + energy
  4. CO2 + glucose ------> H2O + O2 + energy
Grade 11 Evolution
Grade 11 Evolution
Breeding cats to produce ony white ones is an example of                       .
  1. modification selection
  2. breed selection
  3. natural selection
  4. artificial selection
Grade 11 Evolution
Which are examples of a vestigial organ?
  1. legs of a horse
  2. fins of a fish
  3. arms of a monkey
  4. wings of an ostrich
Grade 11 Respiration, Digestion, and Excretion
Where does gas exchange occur?
  1. Left Broncus
  2. Trachea
  3. Alveoli
  4. Terminal Bronicole
Grade 11 Chemistry
Based on the equation shown below:
[math]AlCl_3 + MgS rarr Al_2 S_3 + MgCl_2[/math]
Where should a coefficient of "2" be placed to balance the equation?
  1. In front of [math]AlCl_3[/math]
  2. In front of MgS
  3. In front of [math]Al_2 S_3[/math]
  4. In front of [math]MgCl_2[/math]
Grade 11 Chemistry
What is the chemical name for the formula [math]I_2 N_5[/math]?
  1. diiodine nitride
  2. iodine nitride
  3. diiodine pentanitrogen
  4. diiodine pentanitride
Grade 11 Conservation and Biodiversity
What is a mass extinction?
  1. a rapid increase in biodiversity
  2. the result of an exotic species
  3. the disappearance of many species in a short period of time
  4. a benefit to the environment
Grade 11 Respiration, Digestion, and Excretion
Grade 11 Respiration, Digestion, and Excretion
Grade 11 Macromolecules
Which of these is any very large complex molecule?
  1. nucleic acid
  2. macromolecule
  3. polymer
  4. phosphate
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