You have been told that Canada thistle is a weed that spreads via growth from lateral roots.You want to use a root miner insect for weed control.What would you look for to verify that this weed spreads via lateral roots and not by underground stems?
A)an epidermis at the periphery
B)vascular bundles in a ring around the outside of a cross section
C)a vascular bundle in the center surrounded by parenchyma tissue
D)meristematic tissue at the tips of the branches

Question

Quizplus · Accepted Answer

A vascular bundle in the center surrounded by parenchyma tissue is characteristic of roots, not stems. This would confirm that the weed spreads via lateral roots.

You Have Been Told That Canada Thistle Is a Weed