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OpenStem
@openstem · Joined Jul 2026
7420 public items8 groups
Collection3 items
01Biology · L5 · Systems Biology and Network Modeling
02Biology · L5 · Systems Biology and Network Modeling
03Biology · L5 · Systems Biology and Network Modeling
Biology · L5 · Systems Biology and Network Modeling
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Biology · L5 · Systems Biology and Network ModelingCollection3 items
01Biology · L5 · Tumor Microenvironment and Metastasis
02Biology · L5 · Tumor Microenvironment and Metastasis
03Biology · L5 · Tumor Microenvironment and Metastasis
Biology · L5 · Tumor Microenvironment and Metastasis
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Biology · L5 · Tumor Microenvironment and MetastasisCollection3 items
01Biology · L5 · Advanced Virus-Host Interactions
02Biology · L5 · Advanced Virus-Host Interactions
03Biology · L5 · Advanced Virus-Host Interactions
Biology · L5 · Advanced Virus-Host Interactions
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Biology · L5 · Advanced Virus-Host InteractionsFlashcards10 cards
What are the ovaries, and what two products do they release?1 / 10
The ovaries are a pair of almond-shaped organs in the female pelvis that produce ova (egg cells) through oogenesis and secrete the sex hormones estrogen and progesterone.
Biology · L3 · Reproductive Anatomy
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Biology · L3 · Reproductive AnatomyFlashcards5 cards
Is a rock living or non-living?1 / 5
A rock is non-living. It does not grow, eat, or have babies. Living things do all of these.
Biology · L1 · Living and Non-Living Things
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Biology · L1 · Living and Non-Living ThingsFlashcards5 cards
Where does a fish live?1 / 5
A fish lives in water. It breathes through gills and swims with its fins.
Biology · L1 · Animals and Their Homes
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Biology · L1 · Animals and Their HomesFlashcards10 cards
What do roots do?1 / 10
Roots hold the plant in the soil. They also soak up water for the plant.
Biology · L1 · Parts of a Plant
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Biology · L1 · Parts of a PlantFlashcards10 cards
What four things do plants need to grow?1 / 10
Plants need sunlight, water, air, and soil to grow big and strong.
Biology · L1 · What Plants Need to Grow
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Biology · L1 · What Plants Need to GrowFlashcards10 cards
What is a mammal?1 / 10
A mammal has fur or hair. Mammal mothers feed their babies milk.
Biology · L1 · Animal Groups: Mammals, Birds and Fish
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Biology · L1 · Animal Groups: Mammals, Birds and FishFlashcards10 cards
What is a reptile?1 / 10
A reptile has dry, scaly skin. Snakes, lizards, and turtles are reptiles.
Biology · L1 · Animal Groups: Reptiles, Amphibians and Insects
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Biology · L1 · Animal Groups: Reptiles, Amphibians and InsectsFlashcards10 cards
What is a forest habitat?1 / 10
A forest is a home full of trees. Many animals live there, like deer, owls, and squirrels.
Biology · L1 · Forest, Ocean, and Desert Habitats
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Biology · L1 · Forest, Ocean, and Desert HabitatsFlashcards10 cards
What is the arctic like?1 / 10
The arctic is very cold. It is covered in snow and ice most of the year.
Biology · L1 · Arctic, Pond, and Rainforest Habitats
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Biology · L1 · Arctic, Pond, and Rainforest HabitatsFlashcards10 cards
What is your skeleton made of?1 / 10
Many bones! Your skeleton is lots of bones joined together inside your body.
Biology · L1 · Bones and Muscles Help You Move
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Biology · L1 · Bones and Muscles Help You MoveFlashcards10 cards
What does your heart do?1 / 10
Your heart pumps blood all around your body.
Biology · L1 · Your Heart and Lungs Keep You Alive
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Biology · L1 · Your Heart and Lungs Keep You AliveFlashcards9 cards
What food group helps you grow strong bones?1 / 9
Dairy foods like milk and cheese help build strong bones.
Biology · L1 · Healthy Food & Water
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Biology · L1 · Healthy Food & WaterFlashcards9 cards
Why do we need sleep?1 / 9
Sleep helps your body and brain rest and grow.
Biology · L1 · Sleep, Exercise & Clean Hands
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Biology · L1 · Sleep, Exercise & Clean HandsFlashcards9 cards
What is a baby dog called?1 / 9
A baby dog is called a puppy.
Baby Animals and Their Families
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Baby Animals and Their FamiliesFlashcards10 cards
What does a tadpole grow into?1 / 10
A tadpole grows into a frog.
How Baby Animals Grow and Change
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How Baby Animals Grow and ChangeFlashcards10 cards
What is a food chain?1 / 10
A food chain shows who eats who to get energy.
Biology · L1 · An Ocean Food Chain
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Biology · L1 · An Ocean Food ChainFlashcards10 cards
What is a herbivore?1 / 10
A herbivore is an animal that only eats plants.
Biology · L1 · Who Eats What
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Biology · L1 · Who Eats WhatFlashcards10 cards
What happens to leaves on many trees in autumn (fall)?1 / 10
They change color and fall off the tree.
Plants and Trees Through the Seasons
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Plants and Trees Through the SeasonsFlashcards10 cards
What is migration?1 / 10
When animals travel to a different place, often to find food or warmth.
How Animals Respond to the Seasons
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How Animals Respond to the SeasonsFlashcards10 cards
Are plants and animals alive?1 / 10
Yes! Plants and animals are both living things.
How Plants and Animals Are Alike
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How Plants and Animals Are AlikeFlashcards10 cards
How do plants get food?1 / 10
Plants make their own food using sunlight, water, and air.
How Plants and Animals Are Different
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How Plants and Animals Are DifferentFlashcards10 cards
How many legs does an insect have?1 / 10
An insect has 6 legs.
Biology · L1 · Insects: Legs and Parts
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Biology · L1 · Insects: Legs and PartsFlashcards10 cards
How many legs does a spider have?1 / 10
A spider has 8 legs.
Biology · L1 · Spiders, Worms, and Snails
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Biology · L1 · Spiders, Worms, and SnailsFlashcards10 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 · L1 · Your Eyes and Ears
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Biology · L1 · Your Eyes and EarsFlashcards10 cards
How does your nose let you smell things, like fresh bread?1 / 10
Tiny bits of the bread's smell float in the air. When you breathe in, they touch special spots high inside your nose, and a nerve sends the smell to your brain.
Biology · L1 · Your Nose, Tongue, and Skin
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Biology · L1 · Your Nose, Tongue, and SkinFlashcards10 cards
Where does a chicken egg come from?1 / 10
A hen lays the egg.
Biology · L1 · Inside a Chicken Egg
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Biology · L1 · Inside a Chicken EggFlashcards9 cards
About how long does a hen sit on her eggs before they hatch?1 / 9
A hen usually sits on her eggs for about 21 days.
Biology · L1 · Hatching and Growing Up
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Biology · L1 · Hatching and Growing Up