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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

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Biology: explore STEM content (page 37 of 50) · openstem

Collection5 items

01Biology · L3 · Meiosis Vocabulary and Mechanics

02Biology · L3 · Meiosis vs. Mitosis and Genetic Variation

03Biology · L3 · Meiosis Mechanics Quiz

+2 more

Biology

Biology · L3 · Meiosis

@openstem

Biology · L3 · Meiosis

Quiz5 questions

Where inside a chloroplast do the light-dependent reactions take place?

AThe stromaBThe thylakoid membraneCThe outer membraneDThe cell wall

Biology

Biology · L3 · Plant Biology

@openstem

Biology · L3 · Plant Biology

Quiz5 questions

Which type of endocytosis is best described as a white blood cell engulfing a whole bacterium?

APinocytosisBPhagocytosisCReceptor-mediated endocytosisDExocytosis

Biology

Biology · L3 · Endocytosis and Exocytosis Quiz

@openstem

Biology · L3 · Endocytosis and Exocytosis Quiz

Flowchart8 objects

Biology

Biology · L3 · How Extremophiles Survive — Molecular Adaptations · flowchart

@openstem

Biology · L3 · How Extremophiles Survive — Molecular Adaptations · flowchart

Flowchart8 objects

Biology

Biology · L5 · Synthetic Biology Engineering: Design Principles to Deployed Systems · flowchart

@openstem

Biology · L5 · Synthetic Biology Engineering: Design Principles to Deployed Systems · flowchart

MoleculeO=c1cc[nH]c(=O)[nH]1

Biology

Biology · L3 · Uracil (RNA base)

@openstem

Biology · L3 · Uracil (RNA base)

Quiz5 questions

Why do many desert plants have thick, fleshy stems or leaves?

ATo store water for use during long dry periodsBTo attract pollinators with bright colorsCTo grow taller than nearby plantsDTo produce more seeds each year

Biology

Biology · L2 · How Desert Plants Store Water Quiz

@openstem

Biology · L2 · How Desert Plants Store Water Quiz

Flashcards10 cards

What is a sarcomere?1 / 10

The basic contractile unit of a skeletal muscle fiber, repeated end to end along a myofibril. Each sarcomere is bounded by two Z-discs and contains organized, overlapping actin and myosin filaments.

Biology

Biology · L3 · How Skeletal Muscle Contracts

@openstem

Biology · L3 · How Skeletal Muscle Contracts

Note~685 words · 3 min

Plant Tropisms Beyond Light: Touch and Water Plants cannot walk toward what they need, but they can grow toward it. Beyond bending toward light or responding to gravity, plants also respond to touch and to moisture in the soil. These respon

Biology

Biology · L3 · Plant Tropisms Beyond Light: Touch and Water

@openstem

Biology · L3 · Plant Tropisms Beyond Light: Touch and Water

Note~341 words · 2 min

The Excretory System The excretory system removes metabolic waste products, excess water, and excess ions from the blood, while also helping regulate blood pressure and ion balance. Its central organs are the kidneys, each containing about

Biology

Biology · L3 · The Excretory System

@openstem

Biology · L3 · The Excretory System

Flowchart11 objects

Biology

Biology · L5 · Site Frequency Spectrum-Based Demographic Inference Workflow

@openstem

Biology · L5 · Site Frequency Spectrum-Based Demographic Inference Workflow

Flowchart19 objects

Biology

Island Biogeography Applied to Protected Area Design

@openstem

Island Biogeography Applied to Protected Area Design

Flashcards9 cards

Outline the mechanism by which the lncRNA Xist silences an entire X chromosome in cis.1 / 9

Xist is transcribed from the X-inactivation center (Xic) on the future inactive X and, unlike most lncRNAs, acts exclusively in cis — it does not diffuse to the homologous active X. Xist RNA coats the chromosome from which it is transcribed, spreading outward from the Xic through direct RNA–chromatin contacts assisted by proteins such as SPEN/SHARP, which recruits the NCoR/SMRT–HDAC3 corepressor complex to trigger initial histone deacetylation and Pol II eviction.

Biology

Biology · L5 · Non-Coding RNA and Genomic Imprinting

@openstem

Biology · L5 · Non-Coding RNA and Genomic Imprinting

Flowchart6 objects

Biology

Biology · L1 · How Animals Move · flowchart

@openstem

Biology · L1 · How Animals Move · flowchart

Note~346 words · 2 min

Body Systems Working Together: Circulation and Breathing On their own, the respiratory system and the circulatory system each do one job. The respiratory system moves air in and out of the lungs. The circulatory system pumps blood around th

Biology

Biology · L2 · Body Systems Working Together: Circulation and Breathing

@openstem

Biology · L2 · Body Systems Working Together: Circulation and Breathing

Quiz5 questions

Which structure keeps the trachea held open despite pressure changes during breathing?

ASmooth muscle in the bronchiolesBC-shaped rings of cartilageCThe pleural membraneDThe epiglottis

Biology

Biology · L3 · The Respiratory System

@openstem

Biology · L3 · The Respiratory System

Flowchart10 objects

Biology

Animal Behavior and Ethology · flowchart

@openstem

Animal Behavior and Ethology · flowchart

Flashcards8 cards

What does MRSA stand for?1 / 8

Methicillin-resistant Staphylococcus aureus — a strain of a common bacterium that has evolved resistance to methicillin and many related antibiotics.

Biology

Biology · L3 · MRSA and Fighting Resistance at the Population Level

@openstem

Biology · L3 · MRSA and Fighting Resistance at the Population Level

Flashcards11 cards

State Mendel's law of segregation.1 / 11

Each individual has two alleles for a given trait (one from each parent). During gamete formation, these alleles segregate so each gamete carries only one allele. An offspring inherits one allele from each parent — restoring the diploid condition.

Biology

Biology · L4 · Mendelian Genetics & Heredity

@openstem

Biology · L4 · Mendelian Genetics & Heredity

Quiz5 questions

What is a group of wolves called?

AA herdBA packCA schoolDA flock

Biology

Biology · L1 · Animal Groups: Herds, Flocks, Packs, and Schools Quiz

@openstem

Biology · L1 · Animal Groups: Herds, Flocks, Packs, and Schools Quiz

Flowchart9 objects

Biology

Biology · L2 · How Nerve Cells Send Messages · flowchart

@openstem

Biology · L2 · How Nerve Cells Send Messages · flowchart

Quiz5 questions

Which combination of changes narrows the airways during an asthma attack?

AInflammation, bronchoconstriction, and extra mucusBDestroyed cilia and broken-down alveolar wallsCFluid filling the alveoliDCartilage rings collapsing in the trachea

Biology

Biology · L3 · Respiratory Disorders Quiz

@openstem

Biology · L3 · Respiratory Disorders Quiz

Collection4 items

01Biology · L3 · Bone Structure and Types

02Biology · L3 · Joints and Skeletal Functions

03Biology · L3 · The Skeletal System Quiz

+1 more

Biology

Biology · L3 · The Skeletal System

@openstem

Biology · L3 · The Skeletal System

Flowchart11 objects

Biology

Biology · L5 · Eukaryotic Transcription Activation

@openstem

Biology · L5 · Eukaryotic Transcription Activation

Flashcards10 cards

Why do you have two eyes instead of just one?1 / 10

Two eyes let you see one thing from two slightly different angles at once. Your brain puts the two pictures together so you can tell how far away things are.

Biology

Biology · L1 · Your Eyes and Ears

@openstem

Biology · L1 · Your Eyes and Ears

Flashcards10 cards

What is sexual reproduction?1 / 10

Sexual reproduction is a way of producing offspring by combining genetic material from two parents, usually through the fusion of a sperm cell and an egg cell. The resulting offspring is a genetic mix of both parents, not a clone of either one.

Biology

Biology · L3 · Sexual Reproduction and the Variation Trade-Off

@openstem

Biology · L3 · Sexual Reproduction and the Variation Trade-Off

Flashcards9 cards

What do the salivary glands secrete, and where?1 / 9

Saliva, released into the mouth. It contains the enzyme salivary amylase, which begins breaking down starch into maltose.

Biology

Biology · L3 · Digestive Organs and Secretions

@openstem

Biology · L3 · Digestive Organs and Secretions

Quiz5 questions

What happens if you touch poison ivy?

AYou get stung by tiny hairsBYou get an itchy, blistering rash from its oily sapCYou get poked by sharp spikesDNothing happens at all

Biology

Biology · L2 · Simple Plant Defenses Quiz

@openstem

Biology · L2 · Simple Plant Defenses Quiz

Note~565 words · 3 min

The building blocks of life Living things are built largely from four classes of macromolecules: carbohydrates, lipids, proteins, and nucleic acids. Three of the four — carbohydrates, proteins, and nucleic acids — are polymers, large molecu

Biology

Biology · L3 · Biochemistry: Macromolecules and Enzymes

@openstem

Biology · L3 · Biochemistry: Macromolecules and Enzymes

Flowchart9 objects

Biology

Biology · L4 · Nephron function: filtration, reabsorption, secretion, excretion

@openstem

Biology · L4 · Nephron function: filtration, reabsorption, secretion, excretion

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