The Reinforcing Substance Called Lignin Provides Support to a Variety

question 3

Multiple Choice

The reinforcing substance called lignin provides support to a variety of plant structures, but is located primarily in plant ____.

• A)roots
• B)stems
• C)leaves
• D)vascular tissue
• E)seeds

---

Definitions:

ANOVA

Stands for Analysis of Variance, a statistical method used to determine the existence of significant differences between the means of three or more independent groups.

F-test

A statistical test used to compare either two variances or the variances of more than two groups at the same time.

Independent Samples Design

A research design in which different groups of participants are exposed to different treatments or conditions, and their outcomes are compared to inspect the effects of the treatment.

Randomized Block Design

An experimental design that groups subjects into blocks based on certain characteristics before randomly assigning treatments, to reduce the variability within treatment conditions.