Friday, January 30, 2015

Blog post #9

In order for plants to adapt to changing environments there needs to be variation.    Some traits variation produces are different heights and shapes, unusual colors or marking in their foliage or flowers, or organisms  with greater ability to withstand environmental stresses. When studying all the plants in the WGHS GOLD Main Garden, the leave shapes are the biggest difference among them.  The Brassica Oleracea plants' leaves vary in their overall shape.


This plant has long, wide, rigid           This plant is short and squat. 
leaves. The leaves are somewhat oval      The leaves have an eery purple tint and  
shaped. There is only one leaf per        are in a bud formation.  
stem

This plant has long, thin,                    This plant has more than one leaf
puffy looking leaves. This plant            per stem. Th leaves are jagged with a 
also has one leaf per stem.                 purple stem. 



 There is a lot of variety in visible traits in domestic forms of Brassica Olereaca due to the change of genes within the plant species.  Several processes have helped create this diversity. Such as selective breeding, descent with modification, and natural variation.  Selective breeding is when humans breed plants or animals with each other.  These mixes are usually carried out by breeding professionals and intended to result in a specific trait.  Descent with modification, or evolution, only occurs when there is a change in gene frequency within a population.  Traits will change in a species from generation to generation in order for the plants or animals to survive their living conditions.  Natural variation are mutations that randomly occur during sex cell division.  These variations lead to different phenotypes that change an offspring's ability to survive and reproduce.  The ability of these plants to adapt quickly and have variation is very important for their survival in different situations that may occur.  The variations help allow a species to survive even if one may die off.

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