Virtual Museum of Canada
Jardin botanique de Montréal 
Centre for Forest Research

Dendrochronology

Question 4 of 10: This white birch was photographed in the month of July. What caused it to lose its leaves?

A
A period of drought
B
A late spring
C
A destructive insect pest
D
A summer frost

Betula papyrifera

© Danielle Charron