Think Critically
    1. Form a Hypothesis The deep ocean lies within the aphotic zone and is very cold. Suggest some of the unique characteristics that enable animals to live in the deep ocean.

    2. Form an Opinion A developer has proposed filling in a salt marsh to create a coastal resort. What positive and negative effects do you think this proposal would have on wildlife and local residents? Would you support the proposal?

    Connecting Concepts

    Use Science Graphics

    The following table presents primary productivity (measured in grams of organic matter produced per year per square meter) for several ecosystems. Use the table below to answer questions 33–36.

    A table of 'Productivity of Aquatic and Land Ecosystems' is shown with data for 'Ecosystem' and 'Average Primary Productivity'.  
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    1. Interpret Tables According to the table, which ecosystem is most productive? Use what you know to explain that fact.

    2. Infer The open ocean is among the least productive ecosystems, yet it contributes greatly to the overall productivity of the biosphere. How do you explain this paradox?

    3. Apply Concepts For each set of ecosystems, aquatic and land, explain how abiotic factors may account for the differences in primary productivity seen. Give two examples.

    4. Infer Review the description of the Northwest coniferous forest on page 114. Do you think its average primary productivity is greater or less than that of the tropical savanna? Explain your answer.

    Write About Science

    1. Explanation Choose one of the ten major biomes, and write an overview of its characteristics. Explain how abiotic factors and common plants and wildlife are interrelated. Support your explanation with specific examples.

    2. Assess the How do abiotic factors influence what kinds of organisms are involved in the primary succession in an area following a volcanic eruption?


    End ofPage 126

    Table of Contents

    Miller & Levine Biology UNIT 1 The Nature of Life UNIT 2 Ecology UNIT 3 Cells UNIT 4 Genetics UNIT 5 Evolution UNIT 6 From Microorganisms to Plants UNIT 7 Animals UNIT 8 The Human Body A Visual Guide to The Diversity of Life Appendices Glossary Index Credits