Simard Et Al

Multiple Choice

Simard et al. 1997) further hypothesized that if reciprocal transfer did occur, it would be a source- sink relationship driven by photosynthetic rates. That is, if one seedling is in full sun and the other in deep shade, there will be a net movement of carbon from the seedling in full sun to the one in deep shade. If a shade was placed over the birch seedlings and the cedar, and the Douglas fir was left in full sun, what result could Simard and colleagues expect?

A) The most ¹³C would be found in the cedar.
B) The most ¹⁴C would be found in the cedar.
C) More ¹³C would be found in the Douglas fir than the birch.
D) More ¹³C would be found in the birch than in the Douglas fir.