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DCI in Life Science

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Table 2.2 lists the core ideas in Life Science, as well as the defining questions for each life science DCI. See the framework for more examples and grade band endpoints or the NGSS website for further information.

 
Table 2.2. Disciplinary Core Ideas in Life Science
Core Idea Defining Question

LS1: From Molecules to Organisms: Structures and Processes

How do organisms live, grow, respond to their environment, and reproduce?
LS1.A: Structure and Function How do the structures of organisms enable life’s functions?
LS1.B: Growth and Development of Organisms How do organisms grow and develop?
LS1.C: Organization for Matter and Energy Flow in Organisms How do organisms obtain and use the matter and energy they need to live and grow?
LS1.D: Information Processing How do organisms detect, process, and use information about the environment?
LS2: Ecosystems: Interactions, Energy, and Dynamics How and why do organisms interact with their environment, and what are the effects of these interactions?
LS2.A: Interdependent Relationships in Ecosystems How do organisms interact with the living and nonliving environment to obtain matter and energy?
LS2.B: Cycles of Matter and Energy Transfer in Ecosystems How do matter and energy move through an ecosystem?
LS2.C: Ecosystem Dynamics, Functioning, and Resilience What happens to ecosystems when the environment changes?
LS2.D: Social Interactions and Group Behavior How do organisms interact in groups so as to benefit individuals?
LS3: Heredity: Inheritance and Variation of Traits How are characteristics of one generation passed to the next?
How can individuals of the same species and even siblings have different characteristics?
LS3.A: Inheritance of Traits How are the characteristics of one generation related to the previous generation?
LS3.B: Variation of Traits Why do individuals of the same species vary in how they look, function, and behave?
LS4: Biological Evolution: Unity and Diversity How can there be so many similarities among organisms yet so many different kinds of plants, animals, and microorganisms?
How does biodiversity affect humans?
LS4.A: Evidence of Common Ancestry and Diversity What evidence shows that different species are related?
LS4.B: Natural Selection How does genetic variation among organisms affect survival and reproduction?
LS4.C: Adaptation How does the environment influence populations of organisms over multiple generations?
LS4.D: Biodiversity and Humans What is biodiversity, how do humans affect it, and how does it affect humans?
 

Disciplinary Core Ideas in Life Science

The life sciences focus on living organisms at scales from single molecules to large-scale interactions in the biosphere. Living organisms are parts of whole systems. The life sciences examine the relationships between organisms and their environments. Although there is a wide diversity of life on Earth, biologists and ecologists recognize that all organisms are related through evolutionary processes and ecological interactions. Hereditary processes drive evolution and are key to understanding life on Earth. The framework emphasizes that making sense of the unity and diversity of life on Earth is key to learning the life sciences.

 

 

Aquatic scientists study the wide range of life on Earth, with an emphasis on the organisms and processes that live and interact in the ocean, lakes, and rivers on Earth. For example, marine biologists study how some fish use ultraviolet light to communicate with other fish and how coral larvae settle in an area based on chemical cues. Marine botanists may examine how dissolved oxygen levels in different tidepools affect algae composition. Molecular biologists look at the relationship between how an organism reproduces and the gene flow between different populations. Evolutionary biologists describe cases of convergent evolution, for example fish of many different families living in dark caves have no pigments or functional eyes (Fig. 2.22).

 

Activities and Special Features Aligned with LS1.A: Structure and Function

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  1. Biological > What is Alive > Properties of Life > Activity: Is It Alive?
  2. Biological > What is Alive > Properties of Life > Question Set: Properties of Life
  3. Biological > Aquatic Plants and Algae > What Are Aquatic Plants and Algae > Question Set: What are Aquatic Plants and Algae
  4. Biological > Aquatic Plants and Algae > Structure and Function > Weird Science: Penicillin and the Cell Wall
  5. Biological > Aquatic Plants and Algae > Structure and Function > Weird Science: Kleptoplasty
  6. Biological > Aquatic Plants and Algae > Structure and Function > Activity: Identifying Cells and Cell Parts Using a Microscope
  7. Biological > Aquatic Plants and Algae > Structure and Function > Activity: Structure of Algae with Comparisons to Vascular Plants
  8. Biological > Aquatic Plants and Algae > Evidence of Common Ancestry and Diversity > Activity: Algae Identification with Dichotomous Key
  9. Biological > Aquatic Plants and Algae > Energy Acquisition > Activity: Effect of Light Wavelengths on Photosynthesis
  10. Biological > Aquatic Plants and Algae > Adaptations > Question Set: Adaptations
  11. Biological > Aquatic Plants and Algae > Growth, Development, and Reproduction > Question Set: Growth, Development, and Reproduction
  12. Biological > Invertebrates > What is an Invertebrate? > Question Set: What is an Invertebrate?
  13. Biological > Invertebrates > What is an Invertebrate? > Weird Science: Cool Invertebrate Facts
  14. Biological > Invertebrates > Evidence of Common Ancestry and Diversity > Question Set: Evidence of Common Ancestry and Diversity
  15. Biological > Invertebrates > Structure and Function > Activity: Invertebrate Phylum Project
  16. Biological > Invertebrates > Structure and Function > Question Set: Structure and Function
  17. Biological > Invertebrates > Phylum Porifera > Question Set: Phylum Porifera
  18. Biological > Invertebrates > Phylum Cnidaria > Activity: Nematocysts
  19. Biological > Invertebrates > Phylum Cnidaria > Activity: Corals
  20. Biological > Invertebrates > Phylum Cnidaria > Question Set: Phylum Cnidaria
  21. Biological > Invertebrates > Worms: Phyla Platyhelmintes, Nematoda, and Annelida > Question Set: Worms
  22. Biological > Invertebrates > Phylum Mollusca > Activity: Gastropod Shell Description
  23. Biological > Invertebrates > Phylum Mollusca > Activity: Squid Dissection
  24. Biological > Invertebrates > Phylum Mollusca > Question Set: Phylum Mollusca
  25. Biological > Invertebrates > Phylum Arthropoda > Weird Science: An Inordinate Fondness for Beetles
  26. Biological > Invertebrates > Phylum Arthropoda > Question Set: Phylum Arthropoda
  27. Biological > Invertebrates > Phylum Echinodermata > Activity: Comparing Echinoderms
  28. Biological > Invertebrates > Phylum Echinodermata > Question Set: Phylum Echinodermata
  29. Biological > Invertebrates > Phylum Chordata > Activity: Tunicate Life History
  30. Biological > Invertebrates > Phylum Chordata > Question Set: Phylum Chordata
  31. Biological > Fish > What is a Fish? > Question Set: What is a Fish?
  32. Biological > Fish > What is a Fish? > Activity: Draw a Fish
  33. Biological > Fish > What is a Fish? > Activity: What is a Fish?
  34. Biological > Fish > Evidence of Common Ancestry and Diversity - Fish > Compare-Contrast-Connect: Comparing Different Classes of Fish: Sharks versus Bony Fishes
  35. Biological > Fish > Evidence of Common Ancestry and Diversity - Fish > Question Set: Evidence of Common Ancestry and Diversity - Fish
  36. Biological > Fish > Structure and Function - Fish > Activity: Fish Printing for Form and Function
  37. Biological > Fish > Structure and Function - Fish > Practices of Science: Scientific Drawing
  38. Biological > Fish > Structure and Function - Fish > Activity: Observing Fish Scales
  39. Biological > Fish > Structure and Function - Fish > Activity: Fish Terminology
  40. Biological > Fish > Energy Acquisition, Growth, Development, and Reproduction - Fish > Question Set: Energy Acquisition, Growth, and Reproduction
  41. Biological > Fish > Adaptations - Fish > Activity: Fish Adaptations to the Environment
  42. Biological > Fish > Adaptations - Fish > Question Set: Adaptations
  43. Biological > Fish > Behavior and Sensory Systems > Fish Behavior
  44. Biological > Amphibians Reptiles and Birds > Amphibians > Activity: Identifying Amphibians
  45. Biological > Amphibians Reptiles and Birds > Amphibians > Question Set: Amphibians
  46. Biological > Amphibians Reptiles and Birds > Reptiles > Activity: Identifying Sea Turtles
  47. Biological > Amphibians Reptiles and Birds > Reptiles > Activity: Reptile Thermoregulation
  48. Biological > Amphibians Reptiles and Birds > Reptiles > Question Set: Reptiles
  49. Biological > Amphibians Reptiles and Birds > Birds > Activity: Local Bird Guide
  50. Biological > Amphibians Reptiles and Birds > Birds > Activity: Alert and Escape Behavior
  51. Biological > Mammals > What is a Mammal? > Question Set: What is a Mammal?
  52. Biological > Mammals > Structure and Function > Activity: Identifying Cetaceans
  53. Biological > Mammals > Structure and Function > Activity: Measuring Whale Dimensions
  54. Biological > Mammals > Structure and Function > Question Set: Structure and Function
  55. Biological > Mammals > Structure and Function > Question Set: Structure and Function
  56. Biological > Mammals > Adaptations > Activity: Insulation in Marine Mammals
  57. Biological > Mammals > Energy Acquisition > Activity: Whale Feeding Strategies
  58. Biological > Mammals > Behavior > Question Set: Behavior

 

Activities and Special Features Aligned with LS1.B: Growth and Development of Organisms

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  1. Chemical > Chemistry and Seawater > The Salty Sea > Weird Science: Salt is Essential to Life
  2. Biological > Aquatic Plants and Algae > Growth, Development, and Reproduction > Question Set: Growth, Development, and Reproduction
  3. Biological > Aquatic Plants and Algae > Behavior > Question Set: Behavior
  4. Biological > Invertebrates > What is an Invertebrate? > Question Set: What is an Invertebrate?
  5. Biological > Invertebrates > What is an Invertebrate? > Weird Science: Cool Invertebrate Facts
  6. Biological > Invertebrates > Evidence of Common Ancestry and Diversity > Question Set: Evidence of Common Ancestry and Diversity
  7. Biological > Invertebrates > Structure and Function > Question Set: Structure and Function
  8. Biological > Invertebrates > Phylum Porifera > Question Set: Phylum Porifera
  9. Biological > Invertebrates > Phylum Cnidaria > Question Set: Phylum Cnidaria
  10. Biological > Invertebrates > Worms: Phyla Platyhelmintes, Nematoda, and Annelida > Question Set: Worms
  11. Biological > Invertebrates > Phylum Mollusca > Question Set: Phylum Mollusca
  12. Biological > Invertebrates > Phylum Arthropoda > Activity: Aquatic Invertebrate Behavior
  13. Biological > Invertebrates > Phylum Arthropoda > Question Set: Phylum Arthropoda
  14. Biological > Invertebrates > Phylum Echinodermata > Activity: Comparing Echinoderms
  15. Biological > Invertebrates > Phylum Echinodermata > Question Set: Phylum Echinodermata
  16. Biological > Invertebrates > Phylum Chordata > Question Set: Phylum Chordata
  17. Biological > Fish > What is a Fish? > Question Set: What is a Fish?
  18. Biological > Fish > Evidence of Common Ancestry and Diversity - Fish > Question Set: Evidence of Common Ancestry and Diversity - Fish
  19. Biological > Fish > Energy Acquisition, Growth, Development, and Reproduction - Fish > Question Set: Energy Acquisition, Growth, and Reproduction
  20. Biological > Fish > Behavior and Sensory Systems > Fish Behavior
  21. Biological > Amphibians Reptiles and Birds > Amphibians > Question Set: Amphibians
  22. Biological > Amphibians Reptiles and Birds > Reptiles > Question Set: Reptiles
  23. Biological > Amphibians Reptiles and Birds > Birds > Question Set: Birds
  24. Biological > Mammals > Structure and Function > Question Set: Structure and Function
  25. Biological > Mammals > Growth, Development and Reproduction > Question Set: Growth, Development and Reproduction

 

Activities and Special Features Aligned with LS1.C: Organization for Matter and Energy Flow in Organisms

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  1. Biological > Aquatic Plants and Algae > What Are Aquatic Plants and Algae > Question Set: What are Aquatic Plants and Algae
  2. Biological > Aquatic Plants and Algae > Energy Acquisition > Weird Science: Hydrothermal Vents and Cold Seeps
  3. Biological > Aquatic Plants and Algae > Adaptations > Question Set: Adaptations
  4. Biological > Invertebrates > What is an Invertebrate? > Question Set: What is an Invertebrate?
  5. Biological > Invertebrates > What is an Invertebrate? > Weird Science: Cool Invertebrate Facts
  6. Biological > Invertebrates > Evidence of Common Ancestry and Diversity > Question Set: Evidence of Common Ancestry and Diversity
  7. Biological > Invertebrates > Structure and Function > Question Set: Structure and Function
  8. Biological > Invertebrates > Phylum Porifera > Question Set: Phylum Porifera
  9. Biological > Invertebrates > Phylum Cnidaria > Question Set: Phylum Cnidaria
  10. Biological > Invertebrates > Worms: Phyla Platyhelmintes, Nematoda, and Annelida > Question Set: Worms
  11. Biological > Invertebrates > Phylum Mollusca > Question Set: Phylum Mollusca
  12. Biological > Invertebrates > Phylum Arthropoda > Question Set: Phylum Arthropoda
  13. Biological > Invertebrates > Phylum Echinodermata > Activity: Comparing Echinoderms
  14. Biological > Invertebrates > Phylum Echinodermata > Question Set: Phylum Echinodermata
  15. Biological > Invertebrates > Phylum Chordata > Question Set: Phylum Chordata
  16. Biological > Fish > What is a Fish? > Question Set: What is a Fish?
  17. Biological > Fish > Energy Acquisition, Growth, Development, and Reproduction - Fish > Question Set: Energy Acquisition, Growth, and Reproduction
  18. Biological > Fish > Behavior and Sensory Systems > Fish Behavior
  19. Biological > Amphibians Reptiles and Birds > Amphibians > Question Set: Amphibians
  20. Biological > Amphibians Reptiles and Birds > Reptiles > Question Set: Reptiles
  21. Biological > Amphibians Reptiles and Birds > Birds > Question Set: Birds
  22. Biological > Mammals > Structure and Function > Question Set: Structure and Function
  23. Biological > Mammals > Energy Acquisition > Question Set: Energy Acquisition
  24. Biological > Mammals > Behavior > Question Set: Behavior

 

Activities and Special Features Aligned with LS1.D: Information Processing

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  1. Biological > Aquatic Plants and Algae > Behavior > Question Set: Behavior
  2. Biological > Invertebrates > What is an Invertebrate? > Question Set: What is an Invertebrate?
  3. Biological > Invertebrates > Evidence of Common Ancestry and Diversity > Question Set: Evidence of Common Ancestry and Diversity
  4. Biological > Invertebrates > Structure and Function > Question Set: Structure and Function
  5. Biological > Invertebrates > Phylum Porifera > Question Set: Phylum Porifera
  6. Biological > Invertebrates > Phylum Cnidaria > Activity: Nematocysts
  7. Biological > Invertebrates > Phylum Cnidaria > Question Set: Phylum Cnidaria
  8. Biological > Invertebrates > Worms: Phyla Platyhelmintes, Nematoda, and Annelida > Question Set: Worms
  9. Biological > Invertebrates > Phylum Mollusca > Question Set: Phylum Mollusca
  10. Biological > Invertebrates > Phylum Arthropoda > Activity: Aquatic Invertebrate Behavior
  11. Biological > Invertebrates > Phylum Arthropoda > Question Set: Phylum Arthropoda
  12. Biological > Invertebrates > Phylum Echinodermata > Question Set: Phylum Echinodermata
  13. Biological > Invertebrates > Phylum Chordata > Question Set: Phylum Chordata
  14. Biological > Fish > What is a Fish? > Question Set: What is a Fish?
  15. Biological > Fish > Energy Acquisition, Growth, Development, and Reproduction - Fish > Question Set: Energy Acquisition, Growth, and Reproduction
  16. Biological > Fish > Behavior and Sensory Systems > Fish Behavior
  17. Biological > Amphibians Reptiles and Birds > Birds > Activity: Alert and Escape Behavior
  18. Biological > Mammals > Behavior > Question Set: Behavior

 

Activities and Special Features Aligned with LS2.A: Interdependent Relationships in Ecosystems

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  1. Biological > Aquatic Plants and Algae > Growth, Development, and Reproduction > Weird Science: Invasive Algae

 

Activities and Special Features Aligned with LS2.B: Cycles of Matter and Energy Transfer in Ecosystems

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  1. Biological > Invertebrates > Phylum Echinodermata > Activity: Comparing Echinoderms

 

Activities and Special Features Aligned with LS2.C: Ecosystem Dynamics, Functioning, and Resilience

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Activities and Special Features Aligned with LS2.D: Social Interactions and Group Behavior

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  1. Physical > Navigation and Transportation > Wayfinding and Navigation > Weird Science: Animal Migration
  2. Biological > Aquatic Plants and Algae > Behavior > Question Set: Behavior
  3. Biological > Mammals > Growth, Development and Reproduction > Question Set: Growth, Development and Reproduction
  4. Biological > Mammals > Behavior > Question Set: Behavior

 

Activities and Special Features Aligned with LS3.A: Inheritance of Traits

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  1. Biological > What is Alive > Properties of Life > Question Set: Properties of Life
  2. Biological > Aquatic Plants and Algae > Growth, Development, and Reproduction > Question Set: Growth, Development, and Reproduction

 

Activities and Special Features Aligned with LS3.B: Variation of Traits

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  1. Biological > Aquatic Plants and Algae > Growth, Development, and Reproduction > Question Set: Growth, Development, and Reproduction

 

Activities and Special Features Aligned with LS4.A: Evidence of Common Ancestry and Diversity

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  1. Physical > Atmospheric Effects > Ocean Surface Currents > Compare-Contrast-Connect: Biogeography
  2. Biological > What is Alive > Classification of Life > Activity: What’s in a Name?
  3. Biological > What is Alive > Classification of Life > Activity: Identifying Butterflyfish Using Dichotomous Keys
  4. Biological > What is Alive > Classification of Life > Question Set: Classification of Life
  5. Biological > Aquatic Plants and Algae > Evidence of Common Ancestry and Diversity > Question Set: Evidence of Common Ancestry and Diversity
  6. Biological > Invertebrates > What is an Invertebrate? > Question Set: What is an Invertebrate?
  7. Biological > Invertebrates > Evidence of Common Ancestry and Diversity > Question Set: Evidence of Common Ancestry and Diversity
  8. Biological > Invertebrates > Structure and Function > Question Set: Structure and Function
  9. Biological > Invertebrates > Phylum Porifera > Question Set: Phylum Porifera
  10. Biological > Invertebrates > Phylum Cnidaria > Question Set: Phylum Cnidaria
  11. Biological > Invertebrates > Worms: Phyla Platyhelmintes, Nematoda, and Annelida > Question Set: Worms
  12. Biological > Invertebrates > Phylum Mollusca > Question Set: Phylum Mollusca
  13. Biological > Invertebrates > Phylum Arthropoda > Question Set: Phylum Arthropoda
  14. Biological > Invertebrates > Phylum Echinodermata > Question Set: Phylum Echinodermata
  15. Biological > Invertebrates > Phylum Chordata > Question Set: Phylum Chordata
  16. Biological > Fish > What is a Fish? > Question Set: What is a Fish?
  17. Biological > Fish > What is a Fish? > Activity: Draw a Fish
  18. Biological > Fish > What is a Fish? > Activity: What is a Fish?
  19. Biological > Fish > Evidence of Common Ancestry and Diversity - Fish > Question Set: Evidence of Common Ancestry and Diversity - Fish
  20. Biological > Fish > Structure and Function - Fish > Activity: Fish Printing for Form and Function
  21. Biological > Fish > Adaptations - Fish > Question Set: Adaptations
  22. Biological > Amphibians Reptiles and Birds > Amphibians > Question Set: Amphibians
  23. Biological > Amphibians Reptiles and Birds > Reptiles > Question Set: Reptiles
  24. Biological > Amphibians Reptiles and Birds > Birds > Question Set: Birds
  25. Biological > Mammals > What is a Mammal? > Question Set: What is a Mammal?
  26. Biological > Mammals > Evidence of Common Ancestry and Diversity > Question Set: Evidence of Common Ancestry and Diversity
  27. Biological > Mammals > Structure and Function > Question Set: Structure and Function

 

Activities and Special Features Aligned with LS4.B: Natural Selection

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  1. Biological > What is Alive > Evolution by Natural Selection > Activity: Modeling Evolution
  2. Biological > What is Alive > Evolution by Natural Selection > Weird Science: Species Flocks
  3. Biological > What is Alive > Evolution by Natural Selection > Activity: Simulate Natural Selection
  4. Biological > What is Alive > Evolution by Natural Selection > Compare-Contrast-Connect: Natural and Sexual Selection
  5. Biological > What is Alive > Evolution by Natural Selection > Practices of Science: Common Misconceptions on Evolution
  6. Biological > Aquatic Plants and Algae > Structure and Function > Weird Science: Penicillin and the Cell Wall

 

Activities and Special Feautures Aligned with LS4.C: Adaptation

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  1. Physical > Ocean Depths > Pressure > Compare-Contrast-Connect: The Deep Divers
  2. Physical > Ocean Depths > Depth Zones > Compare-Contrast-Connect: Life in the Depth Zones
  3. Biological > What is Alive > Evolution by Natural Selection > Activity: Modeling Evolution
  4. Biological > What is Alive > Evolution by Natural Selection > Weird Science: Deadly Flu
  5. Biological > What is Alive > Evolution by Natural Selection > Activity: Simulate Natural Selection
  6. Biological > What is Alive > Evolution by Natural Selection > Practices of Science: Common Misconceptions on Evolution
  7. Biological > Aquatic Plants and Algae > Structure and Function > Weird Science: Kleptoplasty
  8. Biological > Aquatic Plants and Algae > Energy Acquisition > Weird Science: Hydrothermal Vents and Cold Seeps
  9. Biological > Aquatic Plants and Algae > Adaptations > Question Set: Adaptations
  10. Biological > Invertebrates > What is an Invertebrate? > Question Set: What is an Invertebrate?
  11. Biological > Invertebrates > What is an Invertebrate? > Weird Science: Cool Invertebrate Facts
  12. Biological > Invertebrates > Evidence of Common Ancestry and Diversity > Question Set: Evidence of Common Ancestry and Diversity
  13. Biological > Invertebrates > Structure and Function > Question Set: Structure and Function
  14. Biological > Invertebrates > Phylum Porifera > Question Set: Phylum Porifera
  15. Biological > Invertebrates > Phylum Cnidaria > Activity: Corals
  16. Biological > Invertebrates > Phylum Cnidaria > Question Set: Phylum Cnidaria
  17. Biological > Invertebrates > Worms: Phyla Platyhelmintes, Nematoda, and Annelida > Question Set: Worms
  18. Biological > Invertebrates > Phylum Mollusca > Activity: Gastropod Shell Description
  19. Biological > Invertebrates > Phylum Mollusca > Question Set: Phylum Mollusca
  20. Biological > Invertebrates > Phylum Arthropoda > Weird Science: An Inordinate Fondness for Beetles
  21. Biological > Invertebrates > Phylum Arthropoda > Question Set: Phylum Arthropoda
  22. Biological > Invertebrates > Phylum Echinodermata > Activity: Comparing Echinoderms
  23. Biological > Invertebrates > Phylum Echinodermata > Question Set: Phylum Echinodermata
  24. Biological > Invertebrates > Phylum Chordata > Question Set: Phylum Chordata
  25. Biological > Fish > What is a Fish? > Question Set: What is a Fish?
  26. Biological > Fish > What is a Fish? > Activity: Draw a Fish
  27. Biological > Fish > What is a Fish? > Activity: What is a Fish?
  28. Biological > Fish > Evidence of Common Ancestry and Diversity - Fish > Compare-Contrast-Connect: Comparing Different Classes of Fish: Sharks versus Bony Fishes
  29. Biological > Fish > Evidence of Common Ancestry and Diversity - Fish > Question Set: Evidence of Common Ancestry and Diversity - Fish
  30. Biological > Fish > Structure and Function - Fish > Activity: Fish Printing for Form and Function
  31. Biological > Fish > Structure and Function - Fish > Activity: Observing Fish Scales
  32. Biological > Fish > Structure and Function - Fish > Activity: Fish Terminology
  33. Biological > Fish > Adaptations - Fish > Activity: Fish Adaptations to the Environment
  34. Biological > Fish > Adaptations - Fish > Question Set: Adaptations
  35. Biological > Amphibians Reptiles and Birds > Amphibians > Question Set: Amphibians
  36. Biological > Amphibians Reptiles and Birds > Reptiles > Question Set: Reptiles
  37. Biological > Amphibians Reptiles and Birds > Birds > Question Set: Birds
  38. Biological > Mammals > Structure and Function > Question Set: Structure and Function
  39. Biological > Mammals > Adaptations > Question Set: Adaptations

 

Activities and Special Features Aligned with LS4.D: Biodiversity and Humans

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  1. Physical > Ocean Depths > Depth Zones > Question Set: Depth Zones
  2. Biological > Invertebrates > Phylum Echinodermata > Activity: Comparing Echinoderms

Exploring Our Fluid Earth, a product of the Curriculum Research & Development Group (CRDG), College of Education. University of Hawaii, 2011. This document may be freely reproduced and distributed for non-profit educational purposes.