1. Of what values are tubers, type of stem modification, to the survival of plant species?
Tubers allow plants to store more carbohydrates.
2. When moving a plant from one place to another, why is it important to leave original soil around the roots?
The original soil should be left around the roots to ensure that all root hairs are transferred to the new location. The original soil also contains the necessary nutrients for the new plant. With some of the old soil, plants will ensure that they have enough of the necessary nutrients and can slowly adjust to the nutrients found in the new soil. A direct change to the new soil could cause the plant go into shock and die.
3. What is the usual cause when a plant wilts?
Plants wilt when the water content within their cells becomes too low. This often happens when the solid around a plant gets too dry or too salty, as this prevents water from moving into the plant.
4. Explain when a seed would be a sink and when it would be a source.
A seed would be a sink when it uses or stores sugar. A seed would be a source when it produces sugar.
5. Why is it necessary that veins are relatively close together in leaves?
Phloem is located in all of the veins of the leaf, so veins help transport minerals and nutrients. The distance between veins shows how well the veins are supplying nutrients to the leaf. The more veins there are, the closer together the veins will be, and the more nutrients the leaf will be supplied with.
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