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Biology: explore STEM content (page 40 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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Quiz5 questions

Which of these is one of the main reasons a body's cells divide?

AGrowthBDigesting foodCProducing soundDStoring memories

Biology

Biology · L2 · The Cell Cycle: Why and How Cells Divide Quiz

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Biology · L2 · The Cell Cycle: Why and How Cells Divide Quiz

MoleculeCC(=O)O

Biology

Biology · L3 · Acetic acid

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Biology · L3 · Acetic acid

Collection5 items

01Biology · L4 · Phototransduction and Transduction Principles

02Biology · L4 · Hearing, Chemoreception, and Mechanoreception

03Biology · L4 · Sensory Physiology Quiz

+2 more

Biology

Biology · L4 · Sensory Physiology

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Biology · L4 · Sensory Physiology

Quiz5 questions

In this example, which allele is dominant for flower color?

A"P", the purple alleleB"p", the white alleleCBoth alleles are equally dominantDNeither allele is dominant

Biology

Biology · L2 · A Gentle Introduction to Punnett Squares Quiz

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Biology · L2 · A Gentle Introduction to Punnett Squares Quiz

Flowchart7 objects

Biology

Biology · L1 · Webs, Hives, and Dams · flowchart

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Biology · L1 · Webs, Hives, and Dams · flowchart

Flashcards10 cards

What is the kidneys' main job?1 / 10

The kidneys filter waste and extra water out of the blood, forming urine to carry that waste out of the body.

Biology

Biology · L2 · Kidneys and the Urinary System

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Biology · L2 · Kidneys and the Urinary System

Flowchart4 objects

Biology

Biology · L3 · Plant Defenses and Adaptations Quiz · flowchart

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Biology · L3 · Plant Defenses and Adaptations Quiz · flowchart

Quiz5 questions

Which of these is an inherited trait?

APlaying the guitarBEye colourCSpeaking FrenchDRiding a skateboard

Biology

Biology · L2 · Traits and Heredity Quiz

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Biology · L2 · Traits and Heredity Quiz

Flashcards10 cards

What is negative pressure breathing?1 / 10

Negative pressure breathing is the mechanism mammals use to inhale: the diaphragm and intercostal muscles enlarge the thoracic cavity, which drops the air pressure inside the lungs below atmospheric pressure, so air flows in to equalize it.

Biology

Biology · L3 · Breathing Mechanics and Gas Exchange

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Biology · L3 · Breathing Mechanics and Gas Exchange

Collection7 items

01Biology · L1 · Living and Non-Living Things

02Biology · L1 · Animals and Their Homes

03Biology · L1 · A Butterfly's Life Cycle

+4 more

Biology

Biology · L1 · Living Things & Life Cycles

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Biology · L1 · Living Things & Life Cycles

Note~385 words · 2 min

Types of Joints: How Bones Connect and Move A joint is any place where two or more bones meet. Not all joints are the same — some let bones move a huge amount, some only let bones twist, and some barely let bones move at all. Scientists gro

Biology

Biology · L2 · Types of Joints: How Bones Connect and Move

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Biology · L2 · Types of Joints: How Bones Connect and Move

Quiz5 questions

A hormone binds a receptor located inside the cytoplasm, and the hormone-receptor complex then binds DNA directly to alter gene transcription. Which hormone class does this describe?

ASteroid hormoneBPeptide hormoneCCatecholamineDGlycoprotein tropic hormone

Biology

Biology · L4 · Endocrine Physiology — 5 Q

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Biology · L4 · Endocrine Physiology — 5 Q

Note~175 words · 1 min

Why and How Cells Divide Right now, all over your body, cells are dividing. A cell divides by splitting into two new cells — and this happens constantly, for a few simple reasons. The table below lists the three main reasons cells divide, w

Biology

Biology · L2 · Why and How Cells Divide

@openstem

Biology · L2 · Why and How Cells Divide

Note~235 words · 1 min

Plants Grow Toward the Light Have you ever seen a plant on a windowsill leaning toward the window? Plants need light to make their own food, so they grow toward the brightest light they can find. A Simple Window Experiment You can see this

Biology

Biology · L1 · Plants Grow Toward the Light

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Biology · L1 · Plants Grow Toward the Light

Flowchart7 objects

Biology

Biology · L2 · Body Language and Visual Signals in Animals · flowchart

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Biology · L2 · Body Language and Visual Signals in Animals · flowchart

Quiz7 questions

The nucleobase below is adenine. What structural feature classifies it as a purine rather than a pyrimidine?

AIt has a single six-membered ring containing two nitrogensBIt has two fused rings — a six-membered ring joined to a five-membered ringCIt carries an amino group, and only purines have amino groupsDIt contains no oxygen, and purines are the bases without oxygen

Biology

Biology · L4 · Reading Biomolecules & Saturation Curves — 7 Q

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Biology · L4 · Reading Biomolecules & Saturation Curves — 7 Q

Plot1 plot · 2 params

Biology

Biology · L5 · Gompertz Mortality Curve

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Biology · L5 · Gompertz Mortality Curve

MoleculeCc1c[nH]c(=O)[nH]c1=O

Biology

Biology · L3 · Thymine (DNA base)

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Biology · L3 · Thymine (DNA base)

Note~298 words · 1 min

How Animals Move Animals need to move to find food, escape danger, and explore the world around them. Different animals move in different ways, using different body parts. Legs for Walking, Running, and Jumping Many animals use legs to get

Biology

Biology · L1 · How Animals Move

@openstem

Biology · L1 · How Animals Move

Note~269 words · 1 min

Animal Camouflage: Hiding in Plain Sight Camouflage is when an animal's color, pattern, or shape helps it hide. Camouflage helps animals stay safe from predators, and it helps hunters sneak up on their prey. Blending In Blending in means an

Biology

Biology · L1 · Animal Camouflage: Hiding in Plain Sight

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Biology · L1 · Animal Camouflage: Hiding in Plain Sight

Quiz5 questions

Why does a polar bear have thick fur?

ATo help it swim fasterBTo keep it warm in cold weatherCTo help it climb treesDTo make it heavier

Biology

Biology · L1 · Animal Coverings Quiz

@openstem

Biology · L1 · Animal Coverings Quiz

Collection5 items

01Biology · L2 · What Is Herd Immunity?

02Biology · L2 · Vaccination Rates and Outbreak Risk

03Biology · L2 · Herd Immunity Quiz

+2 more

Biology

Biology · L2 · Herd Immunity

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Biology · L2 · Herd Immunity

Flashcards9 cards

Contrast bottom-up and top-down proteomics workflows, including what each measures and its principal limitation.1 / 9

Bottom-up (shotgun) proteomics digests proteins into peptides (typically with trypsin, cleaving C-terminal to lysine/arginine) before mass spectrometry, then infers protein identity from peptide spectra; it offers high sensitivity and throughput but loses direct information about which proteoform or combination of co-occurring modifications was present on an intact protein molecule (the protein inference problem).

Biology

Biology · L5 · Proteomics and Mass Spectrometry

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Biology · L5 · Proteomics and Mass Spectrometry

Flashcards10 cards

Define totipotency, and identify the specific developmental window during which totipotent cells exist in the mammalian embryo.1 / 10

A totipotent cell can generate every cell type of the resulting organism, including both the embryonic lineages (all three germ layers) and the extraembryonic lineages (trophectoderm/placenta, primitive endoderm/yolk sac). In mammals, totipotency is restricted to the zygote and the blastomeres of the very early cleavage-stage embryo, up to approximately the 8-cell stage in humans.

Biology

Biology · L5 · Stem Cell Types and Potency

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Biology · L5 · Stem Cell Types and Potency

Quiz5 questions

During prophase I, homologous chromosomes pair up tightly along their length and form a four-chromatid structure. What is this pairing process called?

AIndependent assortmentBSynapsisCCytokinesisDFertilization

Biology

Biology · L3 · Meiosis Mechanics Quiz

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Biology · L3 · Meiosis Mechanics Quiz

Flowchart11 objects

Biology

Biology · L3 · One Parent or Two — Choosing a Reproductive Strategy

@openstem

Biology · L3 · One Parent or Two — Choosing a Reproductive Strategy

Flowchart11 objects

Biology

Biology · L5 · LTP Induction Pathway

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Biology · L5 · LTP Induction Pathway

Flowchart10 objects

Biology

Feedback Inhibition at the First Committed Step

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Feedback Inhibition at the First Committed Step

Flashcards10 cards

What does it mean that DNA replication is 'semi-conservative'?1 / 10

Each new DNA molecule consists of one original (parental) strand and one newly synthesized strand.

Biology

Biology · L3 · DNA Replication

@openstem

Biology · L3 · DNA Replication

Flashcards10 cards

What is metamorphosis?1 / 10

Metamorphosis is the dramatic change in body shape that many insects go through as they grow from a newly hatched egg into an adult. Instead of just getting bigger, the insect's body is rebuilt along the way.

Biology

Biology · L2 · Complete vs. Incomplete Metamorphosis: The Basics

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Biology · L2 · Complete vs. Incomplete Metamorphosis: The Basics

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