signmentProblemiD-111576785 t Data K) 3 of Are these morphological differences d

Question

signmentProblemiD-111576785 t Data K) 3 of Are these morphological differences due to genetic difforences between northem and southem A, nubrum environmental differences between northen and southem locations, such as development populations, or do they arise fro average tomperature, that affect gene expression during leat Seeds of Acer rubrum were collected from four lat seeds collected from the four locations were then a few years of growth, leaves were harvested from the four sets of plants growing in the two locations. The the average number of teeth per leaf area were measured itudinaly distinct sites Ontario (Canada). Pennsylvania, South Carolina, and Florida T groan in a northern location Rode Island 41 40-N) and a southern location (Prida) A Average Area of a Single Number of Teeth per cm Seed Collection Site Tooth (em) of Leaf Area Grown In Grown In Grown in Grown in Rhode Island Florida Rhode Island Florida Ontario 43 32 0 017 0.017 3 9 3 2 Pennsylrania 42.12 N 0.020 0 014 3.0 3.5 South Carolina0 024 33 45" N 0.028 2 3 1.9 Foride 30 65 0 027 0047 0 047 2 1 0.9 Data from D L Royer et al Phenotypic plasticity of leaf shape along a temperature gradient in Acer ubrum PLoS ONE 4(10): 7653 (2009)

Explanation / Answer

Genotype is responsible mostly to determine the leaf tooth traits in Acer rubrum.

Part A:

Going from northern to southern collection sites, what is the general trend in tooth size in leaves of Acer rubrum?

A) The leaves have larger teeth as you go from north to south.

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