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Biology: explore STEM content (page 48 of 50) · openstem

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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Flowchart7 objects

Biology

Biology · L2 · Skin and Kidneys: Getting Rid of Waste · flowchart

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Biology · L2 · Skin and Kidneys: Getting Rid of Waste · flowchart

Note~479 words · 2 min

RNA Biology, Splicing, and Noncoding RNA The transcriptome is shaped after transcription by a series of catalytic and regulatory RNA-processing machineries — the spliceosome, RNA-modifying enzymes, and small and long noncoding RNAs — that t

Biology

Biology · L5 · RNA Biology, Splicing, and Noncoding RNA

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Biology · L5 · RNA Biology, Splicing, and Noncoding RNA

Quiz5 questions

Which of the following is NOT one of the three requirements for natural selection to act on a trait?

AThe trait must vary among individuals in the populationBThe trait must be heritableCThe trait must affect survival or reproductive successDThe trait must appear in every member of the population

Biology

Biology · L3 · Evolution and Natural Selection Quiz

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Biology · L3 · Evolution and Natural Selection Quiz

Flashcards8 cards

What is wilting?1 / 8

Wilting is the drooping of leaves and stems that occurs when plant cells lose enough turgor pressure that they can no longer hold the plant's tissues rigid and upright.

Biology

Biology · L3 · Wilting and Whole-Plant Water Loss

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Biology · L3 · Wilting and Whole-Plant Water Loss

Collection5 items

01Biology · L4 · Antibody Structure and MHC

02Biology · L4 · Complement and Hypersensitivity

03Biology · L4 · Humoral Immunity

+2 more

Biology

Biology · L4 · Immunology

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Biology · L4 · Immunology

Flowchart5 objects

Biology

Biology · L1 · Growing New Plants from Cuttings · flowchart

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Biology · L1 · Growing New Plants from Cuttings · flowchart

Flowchart9 objects

Biology

Distinguishing Vicariance from Dispersal

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Distinguishing Vicariance from Dispersal

Flashcards10 cards

What does CNS stand for, and what does it include?1 / 10

CNS stands for central nervous system. It includes the brain and the spinal cord, the body's main processing and control centres.

Biology

Biology · L3 · CNS, PNS, and the Reflex Arc

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Biology · L3 · CNS, PNS, and the Reflex Arc

Note~1122 words · 6 min

Enzyme Kinetics and Metabolic Pathways Cells run on chemistry, but nearly all of that chemistry is too slow to sustain life without catalysis. Enzyme kinetics gives biologists a quantitative language for describing how fast an enzyme works

Biology

Enzyme Kinetics and Metabolic Pathways

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Enzyme Kinetics and Metabolic Pathways

Collection4 items

01Biology · L5 · Autophagy and Cell Death Pathways

02Biology · L5 · Autophagy and Cell Death Pathways

03Biology · L5 · Necroptosis Signaling Pathway

+1 more

Biology

Biology · L5 · Autophagy and Cell Death Pathways

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Biology · L5 · Autophagy and Cell Death Pathways

Collection3 items

01Biology · L5 · Tumor Microenvironment and Metastasis

02Biology · L5 · Tumor Microenvironment and Metastasis

03Biology · L5 · Tumor Microenvironment and Metastasis

Biology

Biology · L5 · Tumor Microenvironment and Metastasis

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Biology · L5 · Tumor Microenvironment and Metastasis

Flowchart7 objects

Biology

Biology · L4 · Phototropism Signaling Pathway

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Biology · L4 · Phototropism Signaling Pathway

Flowchart9 objects

Biology

Biology · L2 · Joint Types at a Glance

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Biology · L2 · Joint Types at a Glance

Collection5 items

01Biology · L2 · The Brain

02Biology · L2 · Nerves and Reflexes

03Biology · L2 · A Simple Reflex Path

+2 more

Biology

Biology · L2 · Brain and Nerves

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Biology · L2 · Brain and Nerves

Collection4 items

01Biology · L3 · Navigation Mechanisms in Migrating Animals

02Biology · L3 · Animal Migration and Navigation Quiz

03Biology · L3 · How Migrating Animals Navigate

+1 more

Biology

Biology · L3 · Animal Migration and Navigation

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Biology · L3 · Animal Migration and Navigation

Note~521 words · 3 min

Photosynthesis: C3, C4, and CAM Strategies All photosynthesis begins with the same light-dependent reactions, generating ATP and NADPH in the thylakoid, and the same Calvin cycle in the stroma, fixing carbon via rubisco. What differs among

Biology

Photosynthesis: C3, C4, and CAM Strategies

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Photosynthesis: C3, C4, and CAM Strategies

Flowchart7 objects

Biology

Biology · L3 · Vaccine History and Herd Immunity Quiz · flowchart

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Biology · L3 · Vaccine History and Herd Immunity Quiz · flowchart

Flashcards9 cards

In X-ray crystallography, why must a protein be crystallised, and what physical quantity is actually measured in the diffraction experiment?1 / 9

A single protein molecule scatters X-rays far too weakly to detect. A crystal is a periodic lattice of billions of identically oriented copies of the molecule; their scattered waves interfere constructively only along discrete directions defined by the lattice (Bragg's law, nλ = 2d sinθ), amplifying the signal into measurable diffraction spots (reflections).

Biology

Biology · L5 · Experimental Structure Determination

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Biology · L5 · Experimental Structure Determination

Flowchart5 objects

Biology

Biology · L3 · Mass Extinction and Adaptive Radiation Quiz · flowchart

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Biology · L3 · Mass Extinction and Adaptive Radiation Quiz · flowchart

Quiz5 questions

Most vertebrate limb muscles (e.g. the biceps at the elbow) operate as which type of lever, and what functional tradeoff does this represent?

AFirst-class lever; maximizes static holding forceBSecond-class lever; always favors mechanical advantage greater than 1CThird-class lever; sacrifices mechanical advantage for greater speed and range of motionDNo lever system is involved in limb movement

Biology

Biology · L4 · Biomechanics and Animal Locomotion Quiz

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Biology · L4 · Biomechanics and Animal Locomotion Quiz

Quiz5 questions

Why do most leaves appear green in spring and summer?

AChlorophyll is the only pigment leaves ever containBChlorophyll is so abundant it overpowers the other pigments presentCCarotenoids turn green when temperatures are warmDAnthocyanins are destroyed by sunlight

Biology

Biology · L2 · Leaf Pigments and Color Change Quiz

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Biology · L2 · Leaf Pigments and Color Change Quiz

Quiz5 questions

What dynamical behavior does a coherent type-1 feed-forward loop with AND logic characteristically produce in response to a brief, transient activating pulse?

AIt amplifies the pulse into a much larger, sustained response.BIt filters out the brief pulse (does not activate the target gene) while still responding to a persistent signal, acting as a sign-sensitive delay element.CIt converts the pulse into sustained oscillations.DIt has no effect on the dynamics of the target gene.

Biology

Biology · L5 · Systems Biology and Network Modeling

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Biology · L5 · Systems Biology and Network Modeling

Flowchart5 objects

Biology

Biology · L1 · Insects in Winter Quiz · flowchart

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Biology · L1 · Insects in Winter Quiz · flowchart

Quiz5 questions

What is the main job of the retina?

ATo focus light onto the back of the eyeBTo control how much light enters the eyeCTo detect light and turn it into nerve signalsDTo carry visual signals to the brain

Biology

Biology · L2 · Sense Organs Quiz

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Biology · L2 · Sense Organs Quiz

Flowchart9 objects

Biology

Antibiotic Disruption of Colonization Resistance

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Antibiotic Disruption of Colonization Resistance

Flashcards10 cards

What is a synapse?1 / 10

A synapse is the tiny gap between the axon terminal of one neuron and the dendrite of the next neuron. Neurons never actually touch — the message has to cross this gap.

Biology