Make sure you have understood everything in this section (Lessons B12, B13, and B14).
Use the Self-Check below, and the Self-Check & Lesson Review Tips to guide your learning.
This is also a good time to visit your Section 4 Checklist to make sure you have completed all the recommended learning activities.

Unit B Section 4 Self-Check

Instructions


Complete the following 6 steps. Don't skip steps – if you do them in order, you will confirm your understanding of this section and create a study bank for the future.

  1. DOWNLOAD the self-check quiz by clicking here.

  2. ANSWER all the questions on the downloaded quiz in the spaces provided. Think carefully before typing your answers. Review the lessons of this section if you need to. Save your quiz when you are done.

  3. COMPARE your answers with the suggested "Self-Check Quiz Answers" below. WAIT! You didn't skip step 2, did you? It's very important to carefully write out your own answers before checking the suggested answers.

  4. REVISE your quiz answers if you need to. If you answered all the questions correctly, you can skip this step. Revise means to change, fix, and add extra notes if you need to. This quiz is NOT FOR MARKS, so it is perfectly OK to correct any mistakes you made. This will make your self-check quiz an excellent study tool you can use later.

  5. SAVE your quiz to a folder on your computer, or to your Private Files. That way you will know where it is for later studying.

  6. CHECK with your teacher if you need to. If after completing all these steps you are still not sure about the questions or your answers, you should ask for more feedback from your teacher. To do this, post in the Course Questions Forum, or send your teacher an email. In either case, attach your completed quiz and ask; "Can you look at this quiz and give me some feedback please?" They will be happy to help you!

Self-Check Time!

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Self-Check Quiz Answers

Click each of the suggested answers below, and carefully compare your answers to the suggested answers.

If you have not done the quiz yet – STOP – and go back to step 1 above. Do not look at the answers without first trying the questions.

GMO crops are useful in many ways.
  • Plants can be genetically modified to produce vitamins and nutrients that malnourished people are not getting in their diets.
  • Plants can be genetically modified to grow better in dry conditions.
  • Growing GMO plants resistant to weed killers (sometimes called Round-up Ready crops) means the farmer can use specific herbicides to destroy weeds in the crop.
  • GMO plants have helped increase the crop yields that farmers need to feed seven billion people on Earth.
Sometimes chemical pesticides are harmful to other living things, but pesticides reduce the damage of insects and fungi. Alternatives to chemical pesticides are available. Biopesticides such as large insects eat smaller pest insects. Some plant materials, such as powdered chrysanthemum flowers, can be used as natural pesticides. Organic farmers are able to grow food without the use of chemical pesticides.
The milk jugs act as little greenhouses for the seedlings. The milk jugs trap heat to produce a warm environment for the seedlings in early spring when the air is often chilly. The warmth protects the fragile seedlings and helps them to grow faster. The jugs also protect the plants from winds.
CSA farms grow a variety of fruits and vegetables. They are not large monoculture farms that grow only one crop. Because CSA farms grow more than one crop and rotate them in their various fields, CSA helps increase biodiversity.
Organic farmers can produce healthy crops without human-made chemicals.
  • Organic farmers add nutrients to the soil with natural fertilizers such as compost and manure, and they deliberately plowed some crops into the soil to add to the humus (decayed plant materials) upon which crops depend for nutrients.
  • Organic farmers practise crop rotation to balance the nutrients in the soil and to reduce chances of insect and disease infestations.
  • Organic farmers might use natural biopesticides rather than chemical herbicides or pesticides.