• Submitted By: pudman
  • Date Submitted: 02/06/2009 4:37 AM
  • Category: Science
  • Words: 452
  • Page: 2
  • Views: 2

.5 Gas Exchange in Plants
Ketan Sachar

1. How are plants adapted to reduce water loss while still allowing for gas exchange?
Plants have adapted to reduce water by developing outgrowths on the surface of there roots. These outgrowths are called roots hairs, roots hairs are responsible for adding considerable surface area to the root, and to provide a moist for gas exchange. As long as the soil is sufficiently aerated and contains water, oxygen will diffuse from the air into the airspaces of the soil and then into moisture film surrounding the soil particles and root hairs. The dissolved oxygen then will enter the root hair cell and by diffusion passes to other cells of the root. At the same time carbon dioxide diffuses with other cells of the body.

2. What are some of the features of the roots that assist plants with the exchange of gases?
The roots of plants are magnificent and complex structures they have a lot of outstanding features such as they are covered with a very complex structure called the roots hairs. The are outgrowths which add surface area to the root and provide a moist surface for gas exchange. The root cells can also obtain oxygen from intracellular spaces often found in plant tissues. The rate if respiration within in the plant can only be possible if there is a root, and the root also helps speed up the process of respiration, as well as helps the process of diffusion which keeps the plant healthy and stable as well as able to function.

4. Would you expect a shade-tolerant plant to have more or fewer stomata per leaf than a plant that grows best in full sunlight?
I believe that plants that grow best with full sunlight will have more stomata than the shade-tolerant plants this is because those plants which get full sunlight, the sunlight is the energy for these plants, some times they store this energy for long term this energy is some times made up of useless components passed from the sun such as thermal...

Similar Essays