Describe how Mendel cross-fertilized and self-fertilized pea plants.
1 answer:
Pea plants have several visible differences, and since it is a common plant Mendel saw it as a perfect subject for his experiments, since pea have stamen and stigma these plants can self-pollinate, fertilizing the stigma with stamen's pollen, to prevent this, Mendel removed their stamen.
- <em>Cross-fertilization</em> is the process in which Mendel collected pollen from a plant and transferred it to another plant with its stamen's previously cut.
- <em>Self-fertilization</em> is when the plant's pollen fertilizes itself.
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Depending on the purpose for which the description is needed, there are three various levels of complexity at which the vascular architecture of the liver might be described:
- The first level, known as the conventional level, is equivalent to Couinaud's classic 8-segment scheme and serves as a common language for doctors from other disciplines to define the location of localized hepatic lesions.
- The true branching of the hepatic veins and the main portal pedicles is taken into consideration in the second, surgical level, which will be used for anatomical liver resections and transplantations. Modern surgical and radiological procedures may fully exploit this anatomy, but doing so involves acknowledging that the Couinaud scheme is oversimplified and examining the vascular architecture objectively.
- The third degree of complexity, known as the academic level, is focused on the anatomist and the requirement to provide a systematization that clarifies the apparent conflicts between anatomical literature, radiological imaging, and surgical practice.
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