Vocab
What is an animal with a backbone?
Vertebrates
What is an animal without a backbone?
Invertebrates
What is a skeleton within an animals body?
Why do cnidarians sting other animals?
To make the animals go away
To make themselves invisible
To stun the animals before eating them
To protect their own fertilized eggs
To stun the animals before eating them
Most animals that live in water get oxygen from ____
Food
Water
The air
Air tubes
The water
Exoskeleton
What are animals that have tentacles with the ability to sting?
Cnidarians
Sponge
Which of the following is NOT true about cnidarians?
They are meat-eating animals.
They live in water and on land.
Their body parts are arranged like wheel spokes.
They all have stinging cells.
They live in water and on land.
The exoskeleton provides ____
Food and energy
Air and oxygen
Water and life processes
Protection and body shape
Protection and body shape
What is a worm with a body made from connected sections?
Segmented worm
What is a type of worm with a single opening to its digestive system?
Flatworm
What is a harmful animal that lives in or on another animal?
Parasite
Which of the following is a mollusk without a shell?
Sea anemone
Hydra
Sponge
Octopus
Octopus
The flatworm and the round worm _____
Can harm humans and other animals
Have complex digestive systems
Live only in freshwater habitats
Can be seen only with a microscope
Can harm humans and other animals
What is a worm with a tubelike body and lengthwise muscles?
Roundworm
What is an animal that uses a muscular foot to move?
Mollusk
What is the largest group of arthropods and largest group of animals?
Insects
Which of the following animals is NOT an arthropod?
Grasshopper
Spider
Shrimp
Snail
Snail
The earthworm has ____
Two openings to its digestive system
Slits for taking oxygen into its lungs
Muscles that crisscross
Many stinging cells
Two openings to its digestive system
What is an animal with a jointed exoskeleton?
Arthropod
What are arthropods with eight legs and no antennae?
Arachnids
What are animals with an interior skeleton and spiny skin?
Echinoderms
How does an arthropod protect itself after it molts?
It conceals itself in its habitat.
It changes colors to match its surroundings.
It squirts a dark, inky fluid.
It covers itself with slime.
It conceals itself in its habitat
Mollusks use their macular feet to ____
Move food to their mouths
Move or to burrow in the sand
Release fertilized eggs in the water
Drill into hard surfaces
Move or to burrow in the sand
Sea Urchins ____
Eat dead coral
Eat algae
Keep sharks away
Fertilize sponges
Eat algae