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Biology: explore STEM content (page 15 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.

Content Groups1

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Collection6 items

01Biology · L3 · CRISPR-Cas9: The Molecular Scissors

02Biology · L3 · CRISPR in the Real World

03Biology · L3 · CRISPR Quick-Recall Vocabulary

+3 more

Biology

Biology · L3 · Gene Editing with CRISPR

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Biology · L3 · Gene Editing with CRISPR

Collection5 items

01Biology · L3 · Cellular Respiration Stages

02Biology · L3 · Aerobic vs. Anaerobic Respiration and ATP Yield

03Biology · L3 · Cellular Respiration in Detail Quiz

+2 more

Biology

Biology · L3 · Cellular Respiration

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Biology · L3 · Cellular Respiration

Flowchart9 objects

Biology

Biology · L2 · The Path of Air Through the Body

@openstem

Biology · L2 · The Path of Air Through the Body

Flowchart7 objects

Biology

Biology · L1 · Food Chains in Nature · flowchart

@openstem

Biology · L1 · Food Chains in Nature · flowchart

Flowchart11 objects

Biology

Biology · L3 · Stages of Cellular Respiration

@openstem

Biology · L3 · Stages of Cellular Respiration

Flashcards10 cards

Is skin actually an organ? Why or why not?1 / 10

Yes — skin is the body's largest organ. It is made of living tissue with specific jobs to do, just like the heart or stomach, so scientists count it as an organ.

Biology

Biology · L2 · The Skin: An Organ That Protects and Cools

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Biology · L2 · The Skin: An Organ That Protects and Cools

Flowchart13 objects

Biology

Biology · L4 · Central dogma: from DNA to a folded protein

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Biology · L4 · Central dogma: from DNA to a folded protein

Flashcards10 cards

What is the main function of the kidneys?1 / 10

The kidneys filter waste products, excess water, and excess ions out of the blood, producing urine, while also helping regulate blood pressure, blood volume, and the body's ion balance.

Biology

Biology · L3 · Kidney and Nephron Structure

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Biology · L3 · Kidney and Nephron Structure

Flashcards10 cards

What is a skeleton?1 / 10

A skeleton is the framework of bones inside your body. An adult human skeleton has about 206 bones, all connected together.

Biology

Biology · L2 · The Skeleton

@openstem

Biology · L2 · The Skeleton

Collection5 items

01Biology · L1 · Runners and Bulbs

02Biology · L1 · Growing New Plants from Cuttings

03Biology · L1 · How New Plants Grow Without Seeds Quiz

+2 more

Biology

Biology · L1 · How New Plants Grow Without Seeds

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Biology · L1 · How New Plants Grow Without Seeds

Flashcards9 cards

What is the site frequency spectrum (SFS), and how does its shape differ under neutral demographic equilibrium versus a recent population expansion?1 / 9

The site frequency spectrum tabulates, across all polymorphic sites in a sample, how many sites have a derived (or minor) allele at each possible frequency count in the sample, summarizing the genome-wide distribution of allele frequencies and serving as a compact statistic for demographic and selective inference.

Biology

Biology · L5 · Population Genomics and Selection

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Biology · L5 · Population Genomics and Selection

Collection7 items

01Biology · L3 · Glucose

02Biology · L3 · Glycine (amino acid)

03Biology · L3 · Adenine (DNA base)

+4 more

Biology

Biology · L3 · Molecules of Life

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Biology · L3 · Molecules of Life

Flashcards10 cards

What are homologous chromosomes?1 / 10

A matching pair of chromosomes — one inherited from each parent — that carry genes for the same traits at the same locations, though the specific versions (alleles) of those genes can differ. A human body cell has 23 such pairs.

Biology

Biology · L3 · Meiosis Vocabulary and Mechanics

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Biology · L3 · Meiosis Vocabulary and Mechanics

Note~500 words · 3 min

Blood Types and Transfusion Not all blood is the same. Every person's red blood cells carry (or lack) certain marker molecules called antigens on their surface, and their blood plasma carries antibodies that attack any antigen it does not r

Biology

Biology · L3 · Blood Types and Safe Transfusion

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Biology · L3 · Blood Types and Safe Transfusion

Flowchart7 objects

Biology

Biology · L3 · Mass Extinction and the Rise of New Life · flowchart

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Biology · L3 · Mass Extinction and the Rise of New Life · flowchart

Flashcards9 cards

How does refrigeration slow food spoilage?1 / 9

Refrigerators keep food cold, usually around 4°C (40°F). That cold slows the chemical reactions microbes need to grow and multiply, so spoilage happens much more slowly.

Biology

Biology · L2 · Four Ways to Preserve Food

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Biology · L2 · Four Ways to Preserve Food

Quiz5 questions

AB blood type, in which both A and B antigens are fully and separately expressed on red blood cells, is an example of:

AIncomplete dominanceBCodominanceCEpistasisDGenomic imprinting

Biology

Biology · L4 · Classical Genetics and Inheritance Patterns Quiz

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Biology · L4 · Classical Genetics and Inheritance Patterns Quiz

Note~432 words · 2 min

Gene Editing with CRISPR: The Basics Imagine using find-and-replace in a word processor: you search for an exact phrase, and once it's found, you can delete it, fix it, or swap in something new. CRISPR-Cas9 lets scientists do something simi

Biology

Biology · L3 · Gene Editing with CRISPR: The Basics

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Biology · L3 · Gene Editing with CRISPR: The Basics

Flashcards9 cards

What is a vaccination rate?1 / 9

A vaccination rate (also called vaccination coverage) is the percentage of people in a community who are vaccinated against a particular disease.

Biology

Biology · L2 · Vaccination Rates and Outbreak Risk

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Biology · L2 · Vaccination Rates and Outbreak Risk

Flowchart9 objects

Biology

Biology · L3 · Stages of the Immune Response

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Biology · L3 · Stages of the Immune Response

Collection5 items

01Biology · L5 · Immune Tolerance

02Biology · L5 · Cytokine Signaling Networks

03Biology · L5 · Immune Tolerance and Cytokine Signalling Networks

+2 more

Biology

Biology · L5 · Advanced Immunology

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Biology · L5 · Advanced Immunology

Quiz5 questions

What is a microorganism?

AA living thing so small it can only be seen with a microscopeBAny organism found underwaterCA type of plant cellDA machine used to study cells

Biology

Biology · L2 · Bacteria, Viruses, and Fungi Quiz

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Biology · L2 · Bacteria, Viruses, and Fungi Quiz

Flashcards10 cards

What is CRISPR-Cas9, in simple terms?1 / 10

CRISPR-Cas9 is a gene-editing tool that lets scientists cut DNA at a precise, chosen spot so they can edit it — much like using scissors to cut a document at an exact line so a mistake can be corrected.

Biology

Biology · L3 · CRISPR-Cas9: The Molecular Scissors

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Biology · L3 · CRISPR-Cas9: The Molecular Scissors

Note~432 words · 2 min

How the Body Regulates Temperature Human core body temperature normally stays close to 37°C, whether you're standing in the snow or lying on a beach. This stability is a form of homeostasis, and the organ in charge of it is the hypothalamus

Biology

Biology · L3 · How the Body Regulates Temperature

@openstem

Biology · L3 · How the Body Regulates Temperature

Note~630 words · 3 min

Synaptic Plasticity: The Molecular Basis of Learning and Memory Hebbian Plasticity and Coincidence Detection Hebb's postulate, that cells firing together become more strongly wired together, finds its physiological instantiation in the NMDA

Biology

Biology · L5 · Synaptic Plasticity and Neurodegeneration

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Biology · L5 · Synaptic Plasticity and Neurodegeneration

Note~358 words · 2 min

Metagenomics and Microbial Ecology Microbial communities are studied both taxonomically (who is present) and functionally (what genes and pathways they carry) using culture-independent sequencing approaches, while microbial ecology theory e

Biology

Biology · L5 · Metagenomics and Microbial Ecology

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Biology · L5 · Metagenomics and Microbial Ecology

Note~282 words · 1 min

Animal Homes: Nests, Burrows, Shells, and Webs Many animals build or carry a special home to keep themselves and their babies safe. Each kind of home is made from different materials and used in its own way. Homes Animals Build Homes Animal

Biology

Animal Homes: Nests, Burrows, Shells, and Webs

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Animal Homes: Nests, Burrows, Shells, and Webs

MoleculeO=C=O

Biology

Biology · L2 · Carbon Dioxide (CO₂)

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Biology · L2 · Carbon Dioxide (CO₂)

Quiz5 questions

In bacterial transcription, the primary role of the sigma (σ) factor is to:

ACatalyse phosphodiester bond formation during elongationBRecognise and bind promoter sequences to direct RNA polymerase to the correct start siteCUnwind the DNA double helix at the terminator sequenceDAdd the 5' cap to the nascent transcript

Biology

Biology · L4 · Molecular Genetics and Gene Expression — 5 Q

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Biology · L4 · Molecular Genetics and Gene Expression — 5 Q

Collection4 items

01Biology · L5 · Chromatin and 3D Genome Organization

02Biology · L5 · Chromatin and 3D Genome Organization

03Biology · L5 · Hi-C Experimental Workflow

+1 more

Biology

Biology · L5 · Chromatin and 3D Genome Organization

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Biology · L5 · Chromatin and 3D Genome Organization

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