University of Guyana
Faculty of Natural Sciences
Department of Biology
BIO 1201 – Introductory Biology II
Lecturer: Mrs. Jewel Liddell
Laboratory Exercise # 7
Name: Rae Dawn Brusch
Date of Submission: Tuesday, 26th,March, 2013
Title: Plant Modification
Modification of plants is where by certain plant parts are developed to aid in the survival of that plant in its habitat; whether its change of climate, danger from animals, the necessity of for storage some plants with leaves such as with the Acaia plant turn green and flatten to aid in Photosynthesis.
Over the years, plants have had modified stems, roots and even leaves. The stems of plants have been modified in the forms of stolon, rhizome, bulb and tuber for varying reasons. These reasons include:
* capable of budding to produce clones of the parent plant,
* produces the upward shoot and downward root systems of a new plant and
* for protection from animals and adverse weather/ climate.
In the modifications of roots they are modified into tubers and bulb which also adds as a better storage device. However, some roots, eg. Mangrove, have their roots protruding above ground,. This aides in respiration of the plant and contributes in controlling tides.
Moreover, for plants such as the water lily, the leaves have been modified. These leaves may have tendrils, spathe, fly trap or may be improved in relation to their to size (large), thickness (thin), or both (large and thin). Such modifications are helpful for plats that climb, float, need storage organs, protections from animals among others.
All together, the modification of plants is a necessity. Without it many plants may die in harsh condition.
1. State the modification of fifteen local plants, five under leaf modification, five under stem modification and five under root modification.
2. Identify the plant part that is modified and...