BIOLOGY 173 Lecture Notes - Lecture 2: Plantago Lanceolata, Trifolium Repens, Interspecific Competition
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P plants in 25p/25q > p plants in 25p and. Q plants in 25p/25q > q plants in 25q: list the three parameters of a population that contribute to a t-value. They planted 1 seedling each of rye, ribwort & clover in a pot and measured above-ground biomass after 10 weeks. Rye and clover showed significant differences, whereas ribwort and total plant biomass (sum of all 3 species) were not significantly different. Earthworms tunnel through soil, aerating it and enriching it with their droppings. They do not eat plant roots. a) how would you explain these data? (hint- clover forms an association with nitrogen. 1. 50 g fixing bacteria whereas rye and ribwort do not) (three points) Something about the worms (aeration, drainage, n from droppings) helps rye grow better, and that shifts the competitive balance in its favor. Propose an explanation for this reversal. (two points) One looks at past selective events and the other looks at current selection.
