Mammals & Reptiles
How do mammals and reptiles reproduce?
Mammals are VIVIPAROUS. Their babies are born from the mothers' stomach.
Reptiles are OVIPAROUS. Their babies are born from eggs.
How do fish breathe?
Fish have gills to breathe. Their gills absorb oxygen from water and pass it to the blood, and excrete carbon dioxide.
What is a mollusc's body like?
Molluscs have soft bodies, and most also have a hard shell.
How do coelenterates breathe?
Coelenterates absorb oxygen through their skin.
Why do porifera have pores?
Porifera absorb oxygen and nutrients through their pores.
Do aquatic mammals breathe with lungs or gills? Explain how.
Aquatic mammals breathe with LUNGS. They must come to the surface of the water to breathe. Some have blowholes to expel water and air.
How do fish move?
Fish have fins and tails to help them move. Their fins help them move through the water, and their tails help them change direction.
What is an echinoderm's body like?
Echinoderms have bodies covered with sharp spikes. Some also have arms and tentacles.
How do arthropods reproduce?
Arthropods are OVIPAROUS.
What is a annelid's body like?
Annelids have a long, soft body that is divided into segments.
How do reptiles protect their body from other animals?
Reptiles have SCALES or a SHELL that protects their body from predators and from their environment.
How do amphibians breathe?
When amphibians are young, they have gills to breathe in water.
When they become adults, they grow lungs to breathe air and live on land.
How do echinoderms breathe?
Some echinoderms have gills, and others absorb oxygen through their skin.
What is an arthropod's body like?
Arthropods have an exoskeleton and jointed legs that bend.
How do porifera reproduce?
Porifera reproduce by forming buds. Those buds break off and grow into new organisms.
Reptiles are cold-blooded, and mammals are warm-blooded. What does this mean?
Reptiles can't keep their bodies warm when it is cold outside, so they have sit in the sun.
Mammals can keep their body warm and at a constant temperature even when it is cold outside.
They are all OVIPAROUS.
Name one example of a mollusc and one example of an echinoderm.
Molluscs: mussels, snails, oysters, clams, scallops, octopus, squid
Echinoderms: starfish, sea urchin, sea cucumber
How do arthropods breathe?
Some arthropods have simple lungs. Other arthropods that live in the water, like crabs and lobsters, absorb oxygen through their gills.
How do annelids breathe?
Some annelids have gills, and others absorb oxygen through their skin.
Name at least TWO things that mammals and reptiles have in common.
1. Mammals and reptiles breathe using LUNGS.
2. Mammals and Reptiles may have FOUR LEGS.
3. Mammals and Reptiles can live in the WATER or on LAND.
Birds have aerodynamic bodies. What does this mean?
Their bodies are designed to make it easier for them to fly. Their bones are thin and light, with lots of air spaces inside, and they have wings to help them fly.
Name at least one thing that molluscs and echinoderms have in common.
Molluscs and echinoderms are OVIPAROUS. Some molluscs and some echinoderms breathe with GILLS.
How do coelenterates reproduce? Describe the process.
Coelenterates reproduce by growing a bud, or small body part. Eventually the bud breaks off and grows into a new organism.
Name one example of a porifera and one example of an annelid.
Porifera: sponge
Annelid: worm, leech