Consider the experimental situation described below. Ability to grow in shade ma

Question

Consider the experimental situation described below. Ability to grow in shade may help pines in the dry forests of Arizona resist drought. How well do these pines grow in shade? Investigators planted pine seedlings in a greenhouse in either full light or light reduced to 5% of normal by shade cloth. At the end of the study, they dried the young trees and weighed them. Identify the experimental unit(s) or subject(s). (Select all that apply.) shade cloth drought resistance pine tree seedlings greenhouses rainy seasons Identify the factor(s). (Select all that apply.) temperature amount of watering humidity hours in the day amount of light Identify the treatment(s). (Select all that apply.) shaded to 5% of normal pines in humid forests greenhouses in Arizona full light pines in dry forests Identify the response variable(s). (Select all that apply.) thickness of trees at end of study dry weight at end of study moistness of the soil at end of study height of trees at end of study color of needles at end of study

Explanation / Answer

Experimental Unit -

pine tree seedlings

Factors -

Amount of light

Treatments -

shaded to 5% of normal

Response variable -

Height of trees at end of study.

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