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All fields Software Mathematics Physics Chemistry Biology Engineering Astronomy Environmental Other Biology Biology groups

Explore STEM Content

Search the community's STEM library — free to study, yours to make your own.

Biology

Cells, genetics, ecology and physiology on openstem — flashcards, notes, quizzes, sketches and flowcharts shared by the community. Study free, or clone anything into your library.

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Biology: explore STEM content (page 14 of 50) · openstem

Note~414 words · 2 min

How Animal Parents Care for Their Young Animal parents do not all take care of their babies in the same way. Some feed their babies milk. Some bring up food from their stomach. Some leave their eggs and never come back. And some spend a lon

Biology

Biology · L1 · How Animal Parents Care for Their Young

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Biology · L1 · How Animal Parents Care for Their Young

Flowchart12 objects

Biology

Biology · L3 · From Single Tree to Regional Rainfall

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Biology · L3 · From Single Tree to Regional Rainfall

Flowchart11 objects

Biology

Biology · L5 · iPSC Reprogramming Pathway

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Biology · L5 · iPSC Reprogramming Pathway

Collection5 items

01Biology · L3 · Physical and Chemical Plant Defenses

02Biology · L3 · Defensive Mutualism: The Ant-Acacia Relationship

03Biology · L3 · Plant Defenses and Adaptations Quiz

+2 more

Biology

Biology · L3 · Plant Defenses and Adaptations

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Biology · L3 · Plant Defenses and Adaptations

Flowchart9 objects

Biology

Biology · L3 · DNA Replication Steps

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Biology · L3 · DNA Replication Steps

Flowchart13 objects

Biology

Biology · L1 · What Pets and Farm Animals Need

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Biology · L1 · What Pets and Farm Animals Need

Collection5 items

01Biology · L2 · Meet the Neuron

02Biology · L2 · Crossing the Synapse

03Biology · L2 · How Nerve Cells Send Messages Quiz

+2 more

Biology

Biology · L2 · How Nerve Cells Send Messages

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Biology · L2 · How Nerve Cells Send Messages

Collection5 items

01Biology · L5 · The Conserved Developmental Toolkit

02Biology · L5 · Mechanisms of Morphological Evolution

03Biology · L5 · Evolutionary Developmental Biology Quiz

+2 more

Biology

Biology · L5 · Evolutionary Developmental Biology (Evo-Devo)

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Biology · L5 · Evolutionary Developmental Biology (Evo-Devo)

Flowchart7 objects

Biology

Biology · L1 · Bees, Butterflies, and Flowers Quiz · flowchart

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Biology · L1 · Bees, Butterflies, and Flowers Quiz · flowchart

Flashcards10 cards

How does a cochlear hair cell convert mechanical deflection of its stereocilia into an electrical signal?1 / 10

Stereocilia are arranged in rows of increasing height and connected between adjacent rows by fine protein filaments called tip links. Deflection of the stereocilia bundle toward the tallest row increases tension on the tip links, which mechanically pulls open mechanoelectrical transduction (MET) channels at their lower end. Because the surrounding endolymph is K+-rich and positively charged relative to the hair cell interior, opening MET channels drives an inward K+ current that depolarizes the cell within microseconds — among the fastest transduction mechanisms in biology.

Biology

Biology · L4 · Hearing, Chemoreception, and Mechanoreception

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Biology · L4 · Hearing, Chemoreception, and Mechanoreception

Quiz5 questions

What determines a person's ABO blood type?

AThe number of red blood cells in their bodyBWhich antigens (A, B, both, or neither) are present on their red blood cellsCThe color of their blood plasmaDHow quickly their blood clots

Biology

Biology · L3 · Blood Types and Transfusion Quiz

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Biology · L3 · Blood Types and Transfusion Quiz

Quiz5 questions

What is a runner?

AA stem that grows out sideways and can root into a new plantBA seed that flies in the windCA flower that makes pollenDA root that grows straight down

Biology

Biology · L1 · How New Plants Grow Without Seeds Quiz

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Biology · L1 · How New Plants Grow Without Seeds Quiz

Note~781 words · 4 min

Animal Behavior and Ethology Ethology asks why animals behave as they do, treating behavior as a trait shaped by natural selection just like morphology or physiology. Behavior sits on a spectrum from rigidly innate to highly flexible and le

Biology

Animal Behavior and Ethology

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Animal Behavior and Ethology

Flashcards10 cards

How many legs does a spider have?1 / 10

A spider has 8 legs.

Biology

Biology · L1 · Spiders, Worms, and Snails

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Biology · L1 · Spiders, Worms, and Snails

Note~566 words · 3 min

Enzyme Regulation and Allostery Metabolic flux must respond to a cell's changing needs on a timescale of seconds, far faster than gene expression can act. Allosteric regulation provides this speed: reversible, non-covalent binding of small-

Biology

Enzyme Regulation and Allostery

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Enzyme Regulation and Allostery

Flashcards10 cards

What is a web, and who spins it?1 / 10

A web is a sticky net that a spider spins from silk thread to catch insects to eat.

Biology

Biology · L1 · Webs, Hives, and Dams

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Biology · L1 · Webs, Hives, and Dams

Flowchart11 objects

Biology

Biology · L5 · Gene Tree/Species Tree Reconciliation

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Biology · L5 · Gene Tree/Species Tree Reconciliation

Flashcards9 cards

What food group helps you grow strong bones?1 / 9

Dairy foods like milk and cheese help build strong bones.

Biology

Biology · L1 · Healthy Food & Water

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Biology · L1 · Healthy Food & Water

Flowchart9 objects

Biology

Biology · L3 · Plant Water Relations Quiz · flowchart

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Biology · L3 · Plant Water Relations Quiz · flowchart

Flashcards10 cards

Why is winter hard for insects?1 / 10

It is very cold, and there are few plants or flowers for insects to eat.

Biology

Biology · L1 · How Insects Survive Winter

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Biology · L1 · How Insects Survive Winter

Flowchart11 objects

Biology

Biology · L5 · Selectin-Mediated Leukocyte Rolling Adhesion

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Biology · L5 · Selectin-Mediated Leukocyte Rolling Adhesion

Note~258 words · 1 min

Inside a Seed and How Seeds Travel A seed looks small and simple, but it is carrying everything a new plant needs to get started. Seeds also have clever ways of traveling far from the plant that made them. What's Inside a Seed? If you could

Biology

Biology · L1 · Inside a Seed and How Seeds Travel

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Biology · L1 · Inside a Seed and How Seeds Travel

Collection4 items

01Biology · L1 · Forest, Ocean, and Desert Habitats

02Biology · L1 · Arctic, Pond, and Rainforest Habitats

03Biology · L1 · Habitats and Homes Quiz

+1 more

Biology

Biology · L1 · Habitats and Homes

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Biology · L1 · Habitats and Homes

Note~341 words · 2 min

Autophagy and Cell Death Pathways Cells continuously balance self-degradation for quality control and nutrient recycling (autophagy) against several distinct, molecularly defined programs for controlled self-destruction (apoptosis, necropto

Biology

Biology · L5 · Autophagy and Cell Death Pathways

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Biology · L5 · Autophagy and Cell Death Pathways

Collection5 items

01Biology · L3 · The Body's Thermostat

02Biology · L3 · Hot and Cold Responses Compared

03Biology · L3 · Homeostasis and Thermoregulation Quiz

+2 more

Biology

Biology · L3 · Thermoregulation

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Biology · L3 · Thermoregulation

Flashcards10 cards

What is a blood type based on?1 / 10

A blood type is based on which antigens — marker molecules — are present on the surface of a person's red blood cells. The ABO system and the Rh system are the two most medically important classification systems.

Biology