All flashcards
Flashcard 1: Which external structure helps many animals move from place to place?
Answer: Legs (or other limbs) used for movement. Limbs provide locomotion through walking, running, swimming, or flying.
Flashcard 2: What is the main function of gills in a fish?
Answer: Take in oxygen from water and release carbon dioxide. Fish extract dissolved oxygen as water flows over gill filaments.
Flashcard 3: What is the function of stomata on leaves?
Answer: Allow gas exchange and release water vapor. These tiny pores open and close to control gas and water movement.
Flashcard 4: What is the function of chlorophyll in plant leaves?
Answer: Capture sunlight energy for photosynthesis. This green pigment absorbs light energy needed for making food.
Flashcard 5: What is the function of seeds in a plant life cycle?
Answer: Grow into a new plant when conditions are right. Seeds contain embryos that germinate when moisture and temperature are suitable.
Flashcard 6: What is the function of fruit on a plant?
Answer: Protect seeds and help spread them. Fruits develop from flowers to aid in seed dispersal.
Flashcard 7: What is the function of a flower in most plants?
Answer: Reproduction by making seeds. Flowers contain reproductive organs that produce seeds.
Flashcard 8: What is the main function of lungs in a land animal?
Answer: Take in oxygen from air and release carbon dioxide. Air sacs in lungs exchange gases between air and blood.
Flashcard 9: What is the main function of a bird's beak?
Answer: Gather and eat food (shape helps with the diet). Beak shape matches food type: curved for meat, flat for seeds.
Flashcard 10: What is the function of sharp teeth (canines) in many animals?
Answer: Tear meat and help catch prey. Pointed teeth pierce and hold struggling prey.
Flashcard 11: What is the function of flat teeth (molars) in many animals?
Answer: Grind and crush food, often plants. Broad surfaces crush tough plant material.
Flashcard 12: What is the main function of the stomach in an animal?
Answer: Break down food during digestion. Acids and enzymes chemically break down food into nutrients.
Flashcard 13: What is the main function of the heart in an animal?
Answer: Pump blood to move oxygen and nutrients through the body. This muscular organ contracts rhythmically to circulate blood.
Flashcard 14: What is the function of the skeleton (bones) in most animals?
Answer: Support the body, protect organs, and allow movement. Bones form a framework that muscles pull against.
Flashcard 15: Identify the best match: Feathers are an external structure mainly used for what function?
Answer: Flight and insulation (keeping warm). Feathers enable birds to fly and trap air for warmth.
Flashcard 16: What is the main function of a leaf?
Answer: Make food for the plant using photosynthesis. Leaves contain chlorophyll to convert sunlight into glucose.
Flashcard 17: What is the main function of a plant's stem?
Answer: Support the plant and transport water and nutrients. The stem acts as the plant's highway system and structural support.
Flashcard 18: What is the main function of a plant's roots?
Answer: Absorb water and minerals and anchor the plant. Roots extend underground to access soil resources and stabilize the plant.
Flashcard 19: What is the main function of the lungs in many animals?
Answer: Take in oxygen and remove carbon dioxide. Gas exchange occurs in tiny air sacs.
Flashcard 20: What is the function of muscles in an animal's body?
Answer: Pull on bones to create movement. Muscles contract and relax to move body parts.
Flashcard 21: What is the main function of an animal's skeleton (bones)?
Answer: Support the body, protect organs, and help movement. Bones form framework and shield vital organs.
Flashcard 22: What is the function of thorns or spines on some plants?
Answer: Protect the plant from animals that might eat it. Sharp structures discourage herbivores.
Flashcard 23: What is the function of fruit on a flowering plant?
Answer: Protect seeds and help spread them. Fruits develop from flowers after pollination.
Flashcard 24: What is the function of a flower on a plant?
Answer: Help the plant reproduce by making seeds. Flowers contain reproductive organs for seed production.
Flashcard 25: What is the function of leaves in most plants?
Answer: Make food using sunlight (photosynthesis). Leaves contain chlorophyll to capture sunlight.
Flashcard 26: What is the main function of the stomach in digestion?
Answer: Break down food using acids and mixing. Churning and acid begin digestion process.
Flashcard 27: Which structure is best for grabbing and tearing meat: flat molars or sharp canines?
Answer: Sharp canines. Pointed teeth pierce and rip flesh easily.
Flashcard 28: Which external structure helps a fish move through water: fins or fur?
Answer: Fins. Flat surfaces push water for swimming.
Flashcard 29: Which structure helps an owl hunt at night: large eyes or hooves?
Answer: Large eyes. Enhanced vision gathers more light in darkness.
Flashcard 30: What is the function of a flower in a flowering plant?
Answer: Reproduction by making seeds (often after pollination). Flowers contain male and female parts for sexual reproduction.