Review Chapter 1 - Review Chapter 1 Short Answer 1 List Six...

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Review Chapter 1 Short Answer 1. List Six Reasons why plants are important and explain why? They are a food source; for vegetarians, daily diet They purify the air; remove the carbon dioxide we create and add oxygen. Aesthetic Beauty; give roses for valentines. Wetland purification of water; mandated wetland purification. Erosion; plants play an important part in preventing erosion. 2. What are some examples of plant-derived pharmaceuticals? Aspirin from willow tree. 3. What criteria must be met for germination to occur? Viable-embryo is alive and capable of germination. Proper environmental conditions. (light, water, nutrients.) Primary dormancy is broken. 4. What are the four stages of seed germination? Uptake of water. Formation of enzyme systems. Breakdown or metabolism of stored food resources. 5. Provide two positive and two negative effects of touch stimulation? Makes plants shorter and sturdier More resistant to water stress Decrease photosynthesis Yellow/die 6. What are four major reasons weeds cause problems among crop plants?
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