Mollusks
Name a mollusk without an external shell
Octopus or slug
How many legs does an insect have?
6
Are fish cold-blooded or warm-blooded?
Cold-blooded.
Do reptiles lay eggs or give birth to live young?
Most lay eggs
Which 2 main groups can all animals be divided into?
Vertebrates and invertebrates
Which mollusk moves using a single muscular foot and often has a spiral shell?
Gastropod (snail)
Which arthropod group has 8 legs and no antennae?
Arachnids
Which fish have skeletons made of cartilage instead of bone?
Cartilaginous fish (sharks)
Which group of animals can live both in water and land?
Amphibians
Which invertebrate group includes jellyfish and sea anemones?
Cnidarians
What type of shell do most bivalves have?
2 shells that are hinged together
What is the hard outer body of an arthropod called?
Exoskeleton
Name a cartilaginous fish. (Shark not valid)
Ray
What is one way mammals are different from other vertebrates?
They have fur or hair and feed their young with milk
Which group of animals includes both birds and mammals?
Vertebrates
What class of mollusks includes squids and cuttlefish?
Cephalopods
Name an arthropod with more than 20 legs
Millipede (myriapod)
Which group includes most fish species today?
Bony fish
How are turtles different from other reptiles?
They have a hard shell for protection
What is the main difference between an amphibian and a fish?
Amphibians can live on land
How do cephalopods defend themselves from predators?
They squirt ink and use camouflage
Which group of marine animals, like starfish, is sometimes confused with arthropods but belongs to its own group?
Echinoderms
Why are cartilaginous fish often found near the top of the food chain?
They are powerful predators with sharp senses
What's a difference between lizards and snakes?
Lizards usually have legs
Why is animal classification useful in science?
- It helps scientists understand how animals are related.
- It helps scientists organize, study, and understand animals better