K and r<span> Reproductive </span>Strategies<span>. In the equations describing growth of populations of organisms, </span>r represents the slope of the line representing exponential growth. The letter K represents the carrying capacity of a habitat for members of a given sort of organism. <span>The population is still at low values relative to the carrying capacity of the environment and thus is growing exponentially with intrinsic reproductive rate </span>r<span> (when it is not subject to environmental perturbations.), hence the name </span>r-strategist.As the name implies, r-selected species are those that place an emphasis on a high growth rate, and, typically exploit less-crowded ecological niches, and produce many offspring, each of which has a relatively low probability of surviving to adulthood (i.e., high r<span>, low K).</span>
Contractile vacuole is an organelle which is damaged from the antibiotic and as a result the cell burst. The main function of contractile vacuole is to regulates the quantity of water inside the cell. If the contractile vacuole is damaged so it does not regulate water required by the cell as a result more water enters inside the cell which results in the bursting of the cell.
