Grade 11 Life Sciences Microorganisms
Quiz by Jo
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45 questions
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- Q1How long ago did microbes appear on Earth?2 billion years ago2.5 million years ago3 million years ago3.5 billion years ago30s
- Q2What was the name of the scientist who discovered that microbes can fix Nitrogen?Louis PasteurMartinus BeijerinckAntonie van LeeuwenhoekAlexander Fleming30s
- Q3Which of the following reasons most correctly describes why is nitrogen fixation so important?Nitrogen is a main element that makes up human brain cells.Nitrogen is a main element that makes up all human cells and biochemistry.Nitrogen is the best element to improve sleep patterns.Nitrogen makes food taste much better.30s
- Q4How do humans obtain Nitrogen?By sleeping at least 7 hours each nightThrough the air that they breathe inThrough the food that they eatThrough the water that they drink30s
- Q5What percentage of the atmosphere is made up of nitrogen?80%50%96%10%30s
- Q6What is the reason why most plants cannot fix nitrogen?Nitrogen cannot dissolve in waterNitrogen is toxic to plants in its natural formNitrogen is a heavy element that cannot move up a plant easilyNitrogen is too stable to be broken down easily30s
- Q7Which group of microorganisms fixes nitrogen in the soil?ProtistaFungiVirusesBacteria30s
- Q8What elements are added to Nitrogen during Nitrogen fixation to form compounds that plants can make use of?Oxygen & HydrogenCarbon & HydrogenCarbon & FluorineOxygen & Carbon30s
- Q9With which types of plants have some microorganisms developed a symbiotic relationship?Tomato and Potato PlantsPea & Bean PlantsRose PlantsCarrot Plants30s
- Q10Where in legumes are microorganisms found?In seedsIn leavesIn root nodulesIn stems30s
- Q11Which enzyme is used to combine hydrogen and nitrogen?HelicaseNitrogenaseHydrogenasePeptidase30s
- Q12Fritz Haber discovered a way to fix nitrogen chemically. What was the product of this process?NitrateNitrogenAmmoniaNitrite30s
- Q13Which of the following is a benefit of the Haber process?It allows Nitrogen to be fixed at different temperaturesFertilisers can be produced on an industrial scaleIt tells us a lot about Nitrogen fixationIt is a very cheap process30s
- Q14What is a disadvantage of inorganic fertilizers?They stop the growth of naturally-occurring plantsThey attract insect pestsThey can be bad for the environmentThey are extremely expensive30s
- Q15How can farmers introduce more nitrogen to nitrogen-poor soils?Plant tomatoes and carrots in the soilSpray nitrogen gas over the nitrogen-poor soilUse pesticides that kill insects which consume nitrogenPlant legumes in the area and then plough them into the soil30s