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Biology: explore STEM content (page 36 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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Collection5 items

01Biology · L3 · Asexual Reproduction Strategies

02Biology · L3 · Sexual Reproduction and the Variation Trade-Off

03Biology · L3 · Asexual vs. Sexual Reproduction Quiz

+2 more

Biology

Biology · L3 · Asexual and Sexual Reproduction Strategies

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Biology · L3 · Asexual and Sexual Reproduction Strategies

Flashcards10 cards

What are the three domains of life?1 / 10

Biology

Biology · L3 · The Three Domains and Phylogenetic Trees

@openstem

Biology · L3 · The Three Domains and Phylogenetic Trees

Flashcards9 cards

What is a Punnett square used for?1 / 9

A grid-based diagram that predicts the possible genotype and phenotype combinations among offspring of a genetic cross, by pairing every possible gamete from one parent with every possible gamete from the other.

Biology

Biology · L3 · Punnett Squares and Inheritance Patterns

@openstem

Biology · L3 · Punnett Squares and Inheritance Patterns

Note~296 words · 1 min

Symbiosis: living together Symbiosis describes a close, long-term interaction between two different species living in direct contact with one another. Ecologists classify symbiotic relationships according to whether each participating speci

Biology

Biology · L3 · Symbiotic Relationships in Ecosystems

@openstem

Biology · L3 · Symbiotic Relationships in Ecosystems

Flowchart9 objects

Biology

Photosynthesis: C3, C4, and CAM Strategies · flowchart

@openstem

Photosynthesis: C3, C4, and CAM Strategies · flowchart

Flowchart9 objects

Biology

Biology · L1 · How Animal Parents Care for Their Young · flowchart

@openstem

Biology · L1 · How Animal Parents Care for Their Young · flowchart

Quiz5 questions

Which feature defines the mollusk group?

AA hard exoskeleton with jointed legsBStinging cells used to capture preyCA soft body, often protected by a shellDA long, tube-shaped body with no legs

Biology

Biology · L2 · Invertebrate Diversity Quiz

@openstem

Biology · L2 · Invertebrate Diversity Quiz

Flashcards10 cards

What is learned behavior?1 / 10

Learned behavior is behavior that changes as a result of experience. Unlike innate behavior, it is not fully present at birth — it develops or is modified through interactions with the environment.

Biology

Biology · L3 · Learned Behavior: Habituation, Imprinting, and Conditioning

@openstem

Biology · L3 · Learned Behavior: Habituation, Imprinting, and Conditioning

Flashcards9 cards

What is melanin?1 / 9

Melanin is a natural pigment — a substance that gives color — made by cells in the skin. It's the main reason skin has the color it does, and it also colors hair and the iris of the eye.

Biology

Biology · L2 · What Is Melanin?

@openstem

Biology · L2 · What Is Melanin?

Note~278 words · 1 min

Caring for Pets and Farm Animals Many people keep animals as pets or on farms. These animals cannot take care of themselves, so they depend on people to look after them. What Every Animal Needs Whether an animal is a pet in a home or a farm

Biology

Caring for Pets and Farm Animals

@openstem

Caring for Pets and Farm Animals

Flowchart7 objects

Biology

Biology · L3 · Animal Thermoregulation Strategies Quiz · flowchart

@openstem

Biology · L3 · Animal Thermoregulation Strategies Quiz · flowchart

Quiz5 questions

An organism that thrives in very hot environments, such as a deep-sea hydrothermal vent, is best described as a:

AHalophileBThermophileCPsychrophileDAlkaliphile

Biology

Biology · L3 · Extremophiles: Life at the Edges Quiz

@openstem

Biology · L3 · Extremophiles: Life at the Edges Quiz

Quiz3 questions

Which one is a living thing?

AA toy carBA puppyCA rockDA spoon

Biology

Biology · L1 · Living or Not?

@openstem

Biology · L1 · Living or Not?

Flashcards10 cards

What is defensive mutualism?1 / 10

Defensive mutualism is a relationship between two species in which one partner provides food or shelter, and in return the other partner actively defends it against enemies. Both species benefit: one gains protection, the other gains a resource, such as food.

Biology

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

@openstem

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

Note~610 words · 3 min

Animal Behavior: Instinct and Learning Ethology is the scientific study of animal behavior, especially behavior in an animal's natural environment. A central question in ethology is how much of a behavior is innate — built in from birth — a

Biology

Biology · L3 · Animal Behavior: Instinct and Learning

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Biology · L3 · Animal Behavior: Instinct and Learning

Flowchart9 objects

Biology

Biology · L2 · How We Keep Food From Spoiling · flowchart

@openstem

Biology · L2 · How We Keep Food From Spoiling · flowchart

Quiz5 questions

What does your heart do?

AHelps you smellBPumps blood around your bodyCHelps you seeDDigests your food

Biology

Biology · L1 · Your Amazing Body

@openstem

Biology · L1 · Your Amazing Body

Flashcards10 cards

Why do living things need nitrogen, and why is atmospheric N2 not directly usable?1 / 10

Nitrogen is a key building block of amino acids (and therefore proteins) and of the nucleotides that make up DNA and RNA. But atmospheric nitrogen gas (N2) is held together by an extremely strong triple bond, so it is chemically unreactive — most organisms have no way to break it apart and must instead absorb nitrogen already in a usable chemical form, such as ammonium or nitrate.

Biology

Biology · L3 · Nitrogen Cycle: Fixation to Assimilation

@openstem

Biology · L3 · Nitrogen Cycle: Fixation to Assimilation

Quiz5 questions

Which pair correctly matches a macromolecule with its monomer?

ALipid — glycerolBProtein — amino acidCNucleic acid — monosaccharideDCarbohydrate — nucleotide

Biology

Biology · L3 · Biochemistry Quiz

@openstem

Biology · L3 · Biochemistry Quiz

Flowchart7 objects

Biology

Biology · L2 · Skin Color and Melanin Explained · flowchart

@openstem

Biology · L2 · Skin Color and Melanin Explained · flowchart

Flowchart9 objects

Biology

Biology · L2 · A Gentle Introduction to Punnett Squares Quiz · flowchart

@openstem

Biology · L2 · A Gentle Introduction to Punnett Squares Quiz · flowchart

Quiz5 questions

What is an annual plant?

AA plant that lives for many yearsBA plant that grows, flowers, and dies in one growing seasonCA plant that only grows in winterDA plant that never makes seeds

Biology

Biology · L1 · How Long Do Plants Live? Quiz

@openstem

Biology · L1 · How Long Do Plants Live? Quiz

Flowchart9 objects

Biology

Biology · L4 · Ventilation Mechanics

@openstem

Biology · L4 · Ventilation Mechanics

Flashcards10 cards

What is a nest?1 / 10

A nest is a home a bird builds, usually woven from twigs, grass, and leaves.

Biology

Biology · L1 · Nests, Burrows, and Shells

@openstem

Biology · L1 · Nests, Burrows, and Shells

Flashcards10 cards

How do plants get food?1 / 10

Plants make their own food using sunlight, water, and air.

Biology

How Plants and Animals Are Different

@openstem

How Plants and Animals Are Different

Flowchart9 objects

Biology

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

@openstem

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

Note~638 words · 3 min

The Lymphatic System: Fluid Return and Immunity The lymphatic system is a low-pressure network of vessels and organs that runs alongside the circulatory system. It has two closely linked jobs: draining excess fluid from body tissues back in

Biology

Biology · L3 · The Lymphatic System: Fluid Return and Immunity

@openstem

Biology · L3 · The Lymphatic System: Fluid Return and Immunity

Collection4 items

01Biology · L5 · Advanced CRISPR Genome Editing

02Biology · L5 · Advanced CRISPR Genome Editing

03Biology · L5 · Prime Editing Reaction Sequence

+1 more

Biology

Biology · L5 · Advanced CRISPR Genome Editing

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Biology · L5 · Advanced CRISPR Genome Editing

Flowchart13 objects

Biology

Biology · L3 · Three Strategies of Plant Defense

@openstem

Biology · L3 · Three Strategies of Plant Defense

Flashcards10 cards

What is stroke volume, and what is a typical resting value?1 / 10

Stroke volume (SV) is the volume of blood ejected by one ventricle in a single contraction, equal to end-diastolic volume minus end-systolic volume. A healthy resting adult has a stroke volume of roughly 70 mL per beat.

Biology

Biology · L4 · Cardiac Output and the Cardiac Cycle

@openstem

Biology · L4 · Cardiac Output and the Cardiac Cycle

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