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Biology: explore STEM content (page 6 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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Note~235 words · 1 min

The Digestive System: Breaking Down Food The digestive system is a long path through your body that turns the food you eat into nutrients your cells can use for energy, growth, and repair. Along the way, several organs each do a specific jo

Biology

Biology · L2 · The Digestive System

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Biology · L2 · The Digestive System

Quiz5 questions

In pea plants, purple flower color (P) is dominant over white flower color (p). What is the genotype of a heterozygous purple-flowered plant?

APPBPpCppDCannot be determined from the phenotype alone

Biology

Biology · L3 · Genetics and Heredity Quiz

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Biology · L3 · Genetics and Heredity Quiz

Flowchart12 objects

Biology

Reptile-to-Mammal Jaw Joint and Middle Ear Transition

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Reptile-to-Mammal Jaw Joint and Middle Ear Transition

MoleculeNc1ncnc2[nH]cnc12

Biology

Biology · L3 · Adenine (DNA base)

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Biology · L3 · Adenine (DNA base)

Flashcards10 cards

Describe the overall structure of the ribosome, comparing prokaryotic and eukaryotic subunit sizes.1 / 10

A ribosome has a large and a small subunit, each built from ribosomal RNA (rRNA) plus proteins. Bacterial (70S) ribosomes: a small 30S subunit (16S rRNA) plus a large 50S subunit (23S + 5S rRNA). Eukaryotic (80S) ribosomes: a small 40S subunit (18S rRNA) plus a large 60S subunit (28S + 5.8S + 5S rRNA). The peptidyl transferase activity that forms peptide bonds resides in the large subunit's rRNA, making the ribosome a ribozyme.

Biology

Biology · L4 · Translation and Gene Regulation

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Biology · L4 · Translation and Gene Regulation

Flowchart5 objects

Biology

Biology · L2 · World Biomes at a Glance · flowchart

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Biology · L2 · World Biomes at a Glance · flowchart

Collection5 items

01Biology · L1 · Your Eyes and Ears

02Biology · L1 · Your Nose, Tongue, and Skin

03Biology · L1 · Your Five Senses Quiz

+2 more

Biology

Biology · L1 · Your Five Senses

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Biology · L1 · Your Five Senses

Flowchart9 objects

Biology

Biology · L2 · Crossing the Synapse Gap

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Biology · L2 · Crossing the Synapse Gap

Quiz5 questions

What is the correct order of steps a scientist typically follows to name a new species?

APublish, Study, Compare, Name, FindBFind, Study, Compare, Name, PublishCName, Find, Study, Publish, CompareDStudy, Find, Name, Compare, Publish

Biology

Biology · L2 · Naming a New Species Quiz

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Biology · L2 · Naming a New Species Quiz

Flashcards10 cards

What causes sickle cell anemia?1 / 10

A mutation in the gene for hemoglobin, the protein in red blood cells that carries oxygen. The mutated hemoglobin can cause red blood cells to become rigid and curved into a sickle (crescent) shape, especially when oxygen levels are low.

Biology

Biology · L3 · Sickle Cell Anemia, Cystic Fibrosis, and Down Syndrome

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Biology · L3 · Sickle Cell Anemia, Cystic Fibrosis, and Down Syndrome

Quiz5 questions

A hormone binds a Gs-coupled receptor. Which enzyme is activated to raise intracellular cAMP?

APhospholipase CBAdenylyl cyclaseCProtein kinase CDPhosphodiesterase

Biology

Biology · L4 · Cell Signaling and Cycle Regulation Quiz

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Biology · L4 · Cell Signaling and Cycle Regulation Quiz

Quiz5 questions

The wings of a bat and the wings of an insect are best described as:

AHomologous, because both function for flightBAnalogous, because they evolved independently from non-homologous ancestral structuresCVestigial in both lineagesDSerially homologous within each individual animal

Biology

Biology · L4 · Comparative Vertebrate Anatomy Quiz

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Biology · L4 · Comparative Vertebrate Anatomy Quiz

Note~337 words · 2 min

Microbiology: Bacteria and Viruses Microbiology is the study of microorganisms too small to see without a microscope, including bacteria and viruses. Bacteria are single-celled prokaryotic organisms with their own cell structures and metabo

Biology

Biology · L3 · Microbiology: Bacteria and Viruses

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Biology · L3 · Microbiology: Bacteria and Viruses

Quiz5 questions

M2-polarized tumor-associated macrophages contribute to tumor progression primarily by:

AProducing high levels of IL-12 and TNF-alpha to boost cytotoxic T cell activity.BSecreting anti-inflammatory and pro-angiogenic factors (IL-10, TGF-beta, VEGF) that suppress cytotoxic T cell activity and promote angiogenesis and invasion.CDirectly killing tumor cells through phagocytosis at a high rate.DPreventing any vascularization of the tumor.

Biology

Biology · L5 · Tumor Microenvironment and Metastasis

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Biology · L5 · Tumor Microenvironment and Metastasis

Flowchart5 objects

Biology

Biology · L1 · Losing Baby Teeth · flowchart

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Biology · L1 · Losing Baby Teeth · flowchart

Flowchart11 objects

Biology

Biology · L3 · Human Nutrition Quiz · flowchart

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Biology · L3 · Human Nutrition Quiz · flowchart

Flowchart7 objects

Biology

Biology · L1 · How Ants Work Together · flowchart

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Biology · L1 · How Ants Work Together · flowchart

Flowchart12 objects

Biology

Biology · L1 · What Does Each Covering Do?

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Biology · L1 · What Does Each Covering Do?

Flowchart9 objects

Biology

Biology · L4 · Renal physiology: filtration, reabsorption, and hormonal control · flowchart

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Biology · L4 · Renal physiology: filtration, reabsorption, and hormonal control · flowchart

Collection4 items

01How Plants and Animals Are Alike

02How Plants and Animals Are Different

03Plants, Animals, and Living Things Quiz

+1 more

Biology

Biology · L1 · Plants, Animals, and Living Things

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Biology · L1 · Plants, Animals, and Living Things

Flashcards10 cards

What is a microscope?1 / 10

A microscope is an instrument that uses lenses to make small objects look much bigger, so scientists can study things too tiny to see with their eyes alone — like cells.

Biology

Biology · L2 · How a Microscope Magnifies the Tiny World

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Biology · L2 · How a Microscope Magnifies the Tiny World

Quiz5 questions

Which animal changes its skin color to match its surroundings?

AZebraBChameleonCGiraffeDButterfly

Biology

Biology · L1 · Animal Camouflage Quiz

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Biology · L1 · Animal Camouflage Quiz

Flowchart5 objects

Biology

Biology · L3 · Gene Editing with CRISPR Quiz · flowchart

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Biology · L3 · Gene Editing with CRISPR Quiz · flowchart

Note~121 words · 1 min

Staying Healthy Every Day Your body works hard every day. Simple habits help it stay strong and happy. Eating healthy food gives your body the fuel it needs. Drinking water keeps you cool and helps you think. Sleep gives your body time to r

Biology