Inquiry into Life 14th Edition by Sylvia Mader,Michael Windelspecht

تمرين 14

Choose the best answer for each question.
Annual rings are the number of
A) internodes in a stem.
B) rings of vascular bundles in a monocot stem.
C) layers of xylem in a stem.
D) bark layers in a woody stem.
E) Both b and c are correct.