1.Explain the difference between Stabilizing selection, disruptive selection & Directional Selectin.
These three terms are used in population genetics. The three are linked to natural selection, or changes and changes in gene frequencies in populations of organisms over time, resulting in phenotypes would be beneficial. A phenotype is a set of visible features an organism has been based on their genes.
Stabilizing the direction is when the overall genetic diversity decreases and a particular set of characteristics become dominant among a population. This is the most common action of natural selection, as it serves to stabilize over time by removing the ends and the perpetuation of a standard.
Disruptive selection is the opposite of stabilizing selection. Standardized features are disadvantaged and become favored extreme features, resulting in a divergence of a population.…show more content… Define the terms pollination, fertilization and germination and describe how each process relates to plant reproduction.
Pollination is the transfer of pollen from the male organ of a flower to the female organ of the flower. The male organ known as an anther produces pollen grains containing male genetic material. In most flowers, anthers are on the tip of a stem known as a yarn. An organ called a stigma is the female part designed to receive the pollen grains. It is at the tip of a female organ called the pistil, which transmit sperm stigma with the ovary that contains the egg or eggs.
Fertilization, which is the union of sperm and egg, occurs deep within the flower after pollination. When a pollen grain lands on the stigma, generates a small tube tip sperm. The tube fits into a tube called a style female pistil. The pollen tube expands style opening of the ovary and deposits the sperm into the egg. The sperm and egg each contain half the need to form a new plant genetic material. When combined, the sexual union is complete and the egg is fertilized. The fertilized egg becomes a seed
