Biology 1001A Lecture Notes - Lecture 22: Arms Race, Immune System, Selective Sweep
14 Feb 2018
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Lecture 22: species interactions and evolutionary arms races. Evolutionary of biology interaction of biotic and abiotic factors of ecology (interaction of species) Mutualism: both species benefit when the other is present (win/win) Competition: both species suffer when the other is present (lose/lose) Competition for light (trees), water, food etc. Both species are doing worse than they would if more species are present. Antagonists: one species (predator/parasite) uses another as a resource (prey) They are taking advantage of one another. Beneficial for predator and detrimental effect on prey. Selection pressure is placed on the organisms in relation to behaviour of one another. Plants evolve better protected seeds from the animals. The herbivores evolve stronger teeth and jaws in relation to harder seeds. They both positively evolve in effect of the evolution of another species. **selection pressure in one species to evolve better. Modern day lion is faster but still may die due to starvation.
