OS
OpenStem
@openstem · Joined Jul 2026
7420 public items8 groups
Collection5 items
01Biology · L3 · Circulatory System and Thermoregulation Across Vertebrate Classes
02Biology · L3 · Skin, Respiration, and Reproduction Across Vertebrate Classes
03Biology · L3 · Comparative Vertebrate Body Plans Quiz
+2 moreBiology · L3 · Comparative Vertebrate Anatomy
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Biology · L3 · Comparative Vertebrate AnatomyCollection5 items
01Biology · L3 · What Biodiversity Is and Why It Matters
02Biology · L3 · Threats to Biodiversity and Conservation Strategies
03Biology · L3 · Biodiversity and Conservation Quiz
+2 moreBiology · L3 · Biodiversity and Conservation
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Biology · L3 · Biodiversity and ConservationCollection5 items
01Biology · L3 · Fungal Structure and Life Cycle
02Biology · L3 · Fungal Roles: Decomposers, Partners, and Pathogens
03Biology · L3 · Fungi: Decomposers, Partners, and Pathogens
+2 moreBiology · L3 · Fungi Biology
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Biology · L3 · Fungi BiologyCollection5 items
01Biology · L3 · Extremophile Categories: Heat, Salt, and Cold
02Biology · L3 · How Extremophiles Survive — Molecular Adaptations
03Biology · L3 · Extremophiles: Life at the Edges Quiz
+2 moreBiology · L3 · Extremophiles
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Biology · L3 · ExtremophilesCollection5 items
01Biology · L3 · Edward Jenner and the Origin of Vaccination
02Biology · L3 · Herd Immunity
03Biology · L3 · Vaccine History and Herd Immunity Quiz
+2 moreBiology · L3 · Vaccine History and Herd Immunity
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Biology · L3 · Vaccine History and Herd ImmunityCollection5 items
01Biology · L3 · Coevolution Basics and the Red Queen Hypothesis
02Biology · L3 · Host-Parasite and Chemical Arms Races
03Biology · L3 · Coevolution and Arms Races Quiz
+2 moreBiology · L3 · Coevolution and Arms Races
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Biology · L3 · Coevolution and Arms RacesCollection5 items
01Biology · L3 · Turgor Pressure and Plasmolysis
02Biology · L3 · Wilting and Whole-Plant Water Loss
03Biology · L3 · Plant Water Relations Quiz
+2 moreBiology · L3 · Plant Water Relations
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Biology · L3 · Plant Water RelationsCollection4 items
01Biology · L3 · Photoperiodism: Sensing Day Length
02Biology · L3 · Photoperiodism Quiz
03Biology · L3 · Photoperiodism: How Plants Sense Day Length
+1 moreBiology · L3 · Photoperiodism
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Biology · L3 · PhotoperiodismCollection4 items
01Biology · L3 · Navigation Mechanisms in Migrating Animals
02Biology · L3 · Animal Migration and Navigation Quiz
03Biology · L3 · How Migrating Animals Navigate
+1 moreBiology · L3 · Animal Migration and Navigation
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Biology · L3 · Animal Migration and NavigationCollection5 items
01Biology · L3 · Meiosis Vocabulary and Mechanics
02Biology · L3 · Meiosis vs. Mitosis and Genetic Variation
03Biology · L3 · Meiosis Mechanics Quiz
+2 moreBiology · L3 · Meiosis
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Biology · L3 · MeiosisCollection5 items
01Biology · L3 · Gibberellins and Ethylene
02Biology · L3 · Cytokinins and Abscisic Acid
03Biology · L3 · Plant Hormones Beyond Auxin Quiz
+2 moreBiology · L3 · Plant Hormones Beyond Auxin
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Biology · L3 · Plant Hormones Beyond AuxinCollection5 items
01Biology · L3 · Endocytosis and Exocytosis Vocabulary
02Biology · L3 · Bulk Transport in Action: Immunity, Cholesterol, and Signaling
03Biology · L3 · Endocytosis and Exocytosis Quiz
+2 moreBiology · L3 · Endocytosis and Exocytosis
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Biology · L3 · Endocytosis and ExocytosisCollection5 items
01Biology · L3 · Natural Selection and Antibiotic Resistance
02Biology · L3 · MRSA and Fighting Resistance at the Population Level
03Biology · L3 · How Antibiotic Resistance Evolves Quiz
+2 moreBiology · L3 · How Antibiotic Resistance Evolves
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Biology · L3 · How Antibiotic Resistance EvolvesCollection5 items
01Biology · L3 · Nitrogen Cycle: Fixation to Assimilation
02Biology · L3 · Nitrogen Cycle: Denitrification and the Full Loop
03Biology · L3 · The Nitrogen Cycle Quiz
+2 moreBiology · L3 · The Nitrogen Cycle
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Biology · L3 · The Nitrogen CycleCollection5 items
01Biology · L3 · Classifying Receptors by Stimulus
02Biology · L3 · Receptor Types in Action
03Biology · L3 · Sensory Receptor Types Quiz
+2 moreBiology · L3 · Sensory Receptor Types
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Biology · L3 · Sensory Receptor TypesCollection5 items
01Biology · L3 · Asexual Reproduction Strategies
02Biology · L3 · Sexual Reproduction and the Variation Trade-Off
03Biology · L3 · Asexual vs. Sexual Reproduction Quiz
+2 moreBiology · L3 · Asexual and Sexual Reproduction Strategies
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Biology · L3 · Asexual and Sexual Reproduction StrategiesCollection5 items
01Biology · L3 · The Three Types of Ecological Pyramids
02Biology · L3 · Why Pyramids Invert: The Phytoplankton Example
03Biology · L3 · Ecological Pyramids Quiz
+2 moreBiology · L3 · Ecological Pyramids
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Biology · L3 · Ecological PyramidsCollection5 items
01Biology · L3 · Thigmotropism: How Plants Respond to Touch
02Biology · L3 · Hydrotropism: Roots Growing Toward Water
03Biology · L3 · Thigmotropism and Hydrotropism Quiz
+2 moreBiology · L3 · Plant Tropisms Beyond Light
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Biology · L3 · Plant Tropisms Beyond LightCollection5 items
01Biology · L3 · Ectotherms, Endotherms, and Heterotherms
02Biology · L3 · Energy Trade-offs of Thermoregulation
03Biology · L3 · Animal Thermoregulation Strategies Quiz
+2 moreBiology · L3 · Animal Thermoregulation Strategies
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Biology · L3 · Animal Thermoregulation StrategiesCollection5 items
01Biology · L3 · Allergies: The IgE-Histamine Pathway
02Biology · L3 · Autoimmune Disease: When the Body Attacks Itself
03Biology · L3 · Allergies and Autoimmune Disease Quiz
+2 moreBiology · L3 · Allergies and Autoimmune Disease
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Biology · L3 · Allergies and Autoimmune DiseaseCollection5 items
01Biology · L3 · One Tree's Daily Water Budget
02Biology · L3 · Forests, Flying Rivers, and Regional Rainfall
03Biology · L3 · Transpiration at Ecosystem Scale Quiz
+2 moreBiology · L3 · Transpiration at Ecosystem Scale
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Biology · L3 · Transpiration at Ecosystem ScaleCollection6 items
01Biology · L3 · CRISPR-Cas9: The Molecular Scissors
02Biology · L3 · CRISPR in the Real World
03Biology · L3 · CRISPR Quick-Recall Vocabulary
+3 moreBiology · L3 · Gene Editing with CRISPR
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Biology · L3 · Gene Editing with CRISPRCollection5 items
01Biology · L3 · The Big Five Mass Extinctions
02Biology · L3 · Adaptive Radiation After Mass Extinction
03Biology · L3 · Mass Extinction and Adaptive Radiation Quiz
+2 moreBiology · L3 · Mass Extinction and Adaptive Radiation
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Biology · L3 · Mass Extinction and Adaptive RadiationCollection1 items
01Biology · L4 · Cell Structure & Organelles
Biology · L4 · Cell Biology Essentials
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Biology · L4 · Cell Biology EssentialsCollection2 items
01Biology · L4 · Mendelian Genetics & Heredity
02Biology · L4 · Molecular Biology — DNA, RNA & Protein
Biology · L4 · Genetics & Inheritance
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Biology · L4 · Genetics & InheritanceCollection5 items
01Biology · L4 · Evolution & Natural Selection
02Biology · L4 · Ecology — Populations, Communities & Ecosystems
03Biology · L4 · Ecology, evolution, and the web of life
+2 moreBiology · L4 · Ecology & Evolution Essentials
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Biology · L4 · Ecology & Evolution EssentialsCollection5 items
01Biology · L4 · Phototransduction and Transduction Principles
02Biology · L4 · Hearing, Chemoreception, and Mechanoreception
03Biology · L4 · Sensory Physiology Quiz
+2 moreBiology · L4 · Sensory Physiology
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Biology · L4 · Sensory PhysiologyCollection5 items
01Biology · L4 · Signal Transduction Pathways
02Biology · L4 · Cell Cycle Checkpoints and Apoptosis
03Biology · L4 · Cell Signaling and Cycle Regulation Quiz
+2 moreBiology · L4 · Cell Signaling and Cycle Regulation
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Biology · L4 · Cell Signaling and Cycle RegulationCollection5 items
01Biology · L4 · Transcription in Depth
02Biology · L4 · Translation and Gene Regulation
03Biology · L4 · Molecular Genetics and Gene Expression — 5 Q
+2 moreBiology · L4 · Molecular Genetics and Gene Expression
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Biology · L4 · Molecular Genetics and Gene ExpressionCollection5 items
01Biology · L4 · Biotechnology — Core Lab Techniques
02Biology · L4 · Biotechnology — Modern Applications
03Biology · L4 · Biotechnology and Recombinant DNA Quiz
+2 moreBiology · L4 · Biotechnology and Recombinant DNA
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Biology · L4 · Biotechnology and Recombinant DNA