A plant species grows at low and high elevation. The plants at high elevation have smaller leaves than the plants at low elevation. You transplant seedlings from low elevation to high elevation and vice versa. The low elevation plants develop small leaves at high elevation and the high elevation plants maintain their small leaf size even at low elevation. [Choose] [Choose] VP=VG+VE VP=VE VP=VG+VE+VGxE VP=VG
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Step 1: The question is asking about the relationship between the plant's phenotype (leaf size) and the environment (elevation). Show more…
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Jens Clausen and colleagues, at the Carnegie Institution of Washington, studied how the size of yarrow plants (Achillea lanulosa) growing on the slopes of the Sierra Nevada varied with elevation. They found that plants from low elevations were generally taller than plants from high elevations, as shown in the diagram. Clausen and colleagues proposed two hypotheses to explain this variation within a species: (1) There are genetic differences between populations of plants found at different elevations. (2) The species has developmental flexibility and can assume tall or short growth forms, depending on local abiotic factors. If you had seeds from yarrow plants found at low and high elevations, what experiments would you perform to test these hypotheses?
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