Consider the diagram of reproduction of yeast cells. Yeast can reproduce both asexually and sexually. During sexual reproduction, alpha or a cells produce ‘a-factor’, which signals the presence of an a cell to neighbouring α cells and the a cells also respond to α factor. Each cell grows a projection towards the opposite cell and this response of haploid cells to the mating factors of the opposite mating type allows for conjugation between a and α cells, but not between cells of the same mating type. What is the advantage to this type of reproduction?

they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.

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the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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