Unit 4: Lesson 16
Choose the best answer.
- 1.Which combination of materials and conditions are needed for seed germination?
- A.
Enough water to digest stored food and enable growth of embryo
- B.
Pesticides and herbicides
- C.
Oxygen for the seedling to carry out aerobic respiration
- D.
Temperature of 15-20 degrees Celsius
- E.
A, C and D are correct
- 2.The lack of ____________ produces the yellow leaves and causes slow plant growth.
- A.
Oxygen
- B.
Nitrogen
- C.
Hydrogen
- D.
None of the above
- 3.The lack of ______________ causes the leaves, fruit, and roots to be small.
- A.
Protein
- B.
Calcium
- C.
Sun
- D.
Water
- 4.In a bag of fertilizer used to increase flower or fruit production, what does the middle number represent?
- A.
Percentage of Phosphorus
- B.
Percentage of Nitrogen
- C.
Percentage of Protein
- D.
None of the above
- 5.The high concentration of _______________ causes the flower and fruit production to increase.
- A.
Phosphates
- B.
Nitrogen
- C.
Oxygen
- D.
None of the above
- 6.True of false: The nitrogen and potassium are still needed for healthy plant growth, but in lower percentages.
- A.
True
- B.
False
- 7.What best defines biological magnification?
- A.
Biological magnification is when substances become more concentrated in organisms at higher trophic levels.
- B.
Biological magnification is when substances become less concentrated in organisms at lower trophic levels.
- C.
Biological magnification is when organisms become more concentrated in substances at higher trophic levels.
- D.
None of the above
- 8.True or false: Ginseng helps improve stamina; provides resistance to stress and disease; sedates and stimulates the central nervous system
- A.
True
- B.
False
- 9.Which plants can be used for medical purposes?
- A.
Cocoa plant and aloe vera
- B.
Dandelion and white willow
- C.
Cinnamon and ginger
- D.
All of the above
- 10.True or False. The eagles are killed because they are at high tropic level and ingest a large amount of pesticides.
- A.
True
- B.
False
- 11.True or False. Any wood plant, such as maple or oak can be used to make the following items: furniture, paper, plastics, rayon, dyes, fuel.
- A.
True
- B.
False
- 12.Two steps that can be taken to improve water quality and avoid soil nutrient depletion are:
- A.
Crop rotation and using cover crops
- B.
Reducing tillage and avoiding traffic on wet soil
- C.
Planting pest-resistant crops and raising farm animals and plants on thesame farms
- D.
All of the above can be taken to improve water quality and avoid soil nutrient depletion.
- 13.True or False: By alternating one crop for a more drought-tolerant crop that requires less water, less fertilizer and water are needed for the plant to grow
- A.
True
- B.
False
- 14.Which steps do not improve water quality and soil nutrient depletion:
- A.
Plants that cover the soil do not allow the Sun to evaporate water from the soil.
- B.
Alternating one crop for a more drought-tolerant crop.
- C.
Avoiding accidental spill of damaging materials.
- D.
None of the above
- 15.If ____________ is reduced, then there is less use of pesticides and nitrates.
- A.
Tillage
- B.
Planting
- C.
Sun Coverage
- D.
B and C
- 16.True or False: By walking on wet soil, the soil is compacted and able to hold less water, which means the nutrients are washed from the soil more easily.
- A.
True
- B.
False
- 17.True or False: Keeping native crops and animals in place minimizes pest problems.
- A.
True
- B.
False
- 18._________________ provide a way to purify waste water at a lower cost than water treatment plants.
- A.
Wetlands
- B.
Farmlands
- C.
Boreal Forests
- D.
None of the above
- 19.True or False: Water treatment plants also provide a habitat to many living organisms.
- A.
True
- B.
False
- 20.What can be done to improve wetlands?
- A.
Planting crops that will hold the soil in place.
- B.
Use environmentally friendly products
- C.
Use more pesticides and herbicides.
- D.
B and C are correct
- 21.________ are used to ward off pests that can harm the growth of crops.
- A.
Pesticide
- B.
Herbicide
- C.
Biological Magnification
- D.
A and B
- 22.____________ are substances that kill or slow the growth of plants that humans consider weeds.
- A.
Pesticides
- B.
Herbicides
- C.
Biological Magnification
- D.
A and B
- 23.What do organic food advocates argue?
- A.
The the use of chemicals is very harmful to our health
- B.
That if more people bought organic food, the price would eventually drop to more affordable levels
- C.
None of the above
- D.
A and B
- 24.True of False. One way of improving both crop resistance and yield is to cross-breed crops with wild relatives.
- A.
True
- B.
False
- 25.True or False. Canada is the largest exporter of forest products in the world.
- A.
True
- B.
False
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