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- 1. Multiple Choice
The step in the nitrogen cycle where plants take up nitrate and use it to make biological molecules is:nitrificationammonificationnitrogen fixationassimilation - 2. Multiple ChoiceThe step in the nitrogen cycle where bacteria convert ammonia (NH3) to nitrate (NO3-) is:nitrificationammonificationnitrogen fixationassimilation
- 3. Multiple ChoiceThe process where some bacteria remove nitrate from the soil by converting it to nitrogen gas is:nitrificationnitrogen fixationdenitrificationnitrification
- 4. Multiple ChoiceWhat part of the nitrogen cycle deals with the conversion of nitrogen in waste products or dead organisms into ammonia?nitrificationammonificationdenitrificationnitrogen fixation
- 5. Multiple ChoiceWhat is the first step in the nitrogen cycle, in which gaseous nitrogen is converted into ammonia?nitrificationammonificationdenitrificationnitrogen fixation
- 6. Multiple ChoiceNitrogen gas accounts for what percentage of the atmosphere?55%5%Less than 1%78%
- 7. Multiple ChoiceNitrogen is essential for living organisms to make:LipidsCarbohydratesProteinsFats
- 8. Multiple ChoiceBiogeochemical cycles:only include processes conducted by or within living organisms.describe the movement of water and other materials throughout the abiotic and biotic environment.only pertain to exchanges and interactions that occur within the atmosphere.are used to describe the attempts of humans to recycle various pollutants.
- 9. Multiple ChoiceWhich of the following is a Nitrite?NO3-NO2-N2NH3
- 10. Multiple ChoiceWhich of the following is a Nitrate?NO3-NO2-N2NH3
- 11. Multiple ChoiceWhich of the following is a atmospheric nitrogen?NO3-NO2-N2NH3
- 12. Multiple ChoiceWhich of the following is ammonia?NO3-NO2-N2NH3
- 13. Multiple ChoiceWhich of the following is the only form of nitrogen algae, and plants can use?NO3-NO2-N2NH3
- 14. Multiple ChoiceWhich of the following can naturally "fix" atmospheric nitrogen so plants can utilize it?only bacteriabacteria and lighteningherbivorescarnivores
- 15. Multiple ChoiceThe type of plant that hosts the bacteria in it's root nodules is acorngrasscactuslegume
- 16. Multiple ChoicePlants or animals that die and are broken down, or living organisms that excrete waste while they are living are recycled into the soil bydetritusatmospheric nitrogennitrogen-fixing bacteriadecomposers
- 17. Multiple ChoiceFertilizer factories take _____ and chemically convert it to _____N2 :: NH4+NO2 :: NH4+N2 :: NO3-NO2 :: NO3-
- 18. Multiple ChoiceThe ammonium ion (NH4+) is broken down by nitrite bacteria to (NO2) and this is broken down by different bacteria toN2NH3NO3NH4+
- 19. Multiple ChoiceBacteria living in the nodules of legume plants take atmospheric nitrogen (N2) and break it down to ______ so plants can use it.N2NO3NH3NH4+
- 20. Multiple ChoiceWhat process is shown at # 6?dentirificationammonificationassimilationfixation
- Answer choicesTagsAnswer choicesTags