# What does a graph showing the growth of forest volume over time looks like 1) A U shape 2) An...

## Question:

What does a graph showing the growth of forest volume over time looks like 1) A U shape 2) An inverted U shape 3) An S shape 4) A pyramid 5) A straight line

Maximizing the profit of timber harvesting involves all of the following except? 1) The total costs of harvesting 2) The total revenues from harvesting 3) The interest rate 4) The ecological value of forest diversity 5) The mean annual increment

The mean annual increment is calculated by ... 1) Dividing the annual change in biomass by the age of a forest 2) Dividing the total biomass by the age of a forest 3) Multiplying the annual change in biomass by the age of a forest 4) Dividing the annual change in biomass by the interest rate 5) Multiplying the annual change in biomass by the interest rate

## Mathematical Models:

Mathematical models refer to the systematic way of analyzing the behaviors and representing different variables in a proper manner. Mathematical models refer to the set of explanation and language to provide the study of various variables and make predictions about the various patterns.

## Answer and Explanation:

a. The correct answer is **3) An S shape**.

This is the correct answer because forests generally follow the cycle of growth and death. Some forest might begin on spacious sites or other may cleared by any natural disaster. In forests with the establishment of woody plants and increase in the carbon volume, the annual vegetation grows faster than it decomposes. The forest volume curve generally has the S-shape because the volume of woody biomass grows at increasing rate for m any years and with the change in fertility it grows at decreasing rate for many years.

b. The correct answer is **5) The mean annual increment**.

This is the correct answer because for the maximization of the profit of timber harvesting the total revenue is subtracted from the total cost. The interest rate is included in the calculation of total cost and ecological value of forest diversity affects the revenue level. The mean annual increment is used to find the estimated increment value for forests and thus is not included in the calculation of profits.

c. The correct answer is **2) Dividing the total biomass by the age of a forest**.

This is the correct answer because while calculating the mean increment value for the forest the net or the total volume of biomass is estimated by the age of the forest.

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from Praxis Biology (5235): Practice & Study Guide

Chapter 1 / Lesson 14