What is the function of the bristles on the crayfish's body?
Sensing the environment.
100
In a pond, crayfish eat small fish. What would happen if the crayfish ate all of the small fish in a pond?
It would die or move to another place.
100
Which of the following animals would you expect to find in a rain forest?
A. fruit bats
B. caribou
C. cactus
D. prairie dogs
A. fruit bats
100
What does a snail do if its environment is too dry?
It estivates (goes inside its shell).
100
A BODY PART that helps an animal survive is called a ______________ adaptation.
Structural
200
The part of the crayfish that is most used for swimming in the water is the ______?
The tail.
200
What might happen if the water in a crayfish habitat evaporated?
It would die or move to another place.
200
In which of the following environments would the prairie dog live?
A. forest
B. tundra
C. desert
D. grassland
D. grassland
200
Crayfish have antennae to "smell" and "feel" their environment. Snails have _____________ for this purpose.
tentacles
200
Something an animal DOES to help it survive is called a _______________ adaptation.
Behavioral.
300
Name one crayfish adaptation that helps it protect itself.
Pincers or tail for shooting backwards.
300
Name one way a beaver changes its environment.
Builds a dam or eats trees.
300
What adaptation does a mallard duck have that helps it survive in the water in a pond environment?
A. Ducks have webbed feet for swimming.
B. Ducks have wings for flying.
C. Ducks have feathers to attract friends.
D. Ducks have bills for gathering food.
A. Ducks have webbed feet for swimming
300
What is the liquid trail left behind a snail when it travels?
Slime or mucus.
300
______________ is when a crayfish loses its hard outer shell in order to grow bigger.
Molting
400
What is an adaptation that helps crayfish raise their young?
Keeping eggs under the tail.
400
What do animals do in an environment when it changes?
They will die, move away or adapt to the new environment.
400
Which of the following is NOT an example of how animals change their environment?
A. beaver dams
B. mud slides
C. bird nests
D. buried acorns
B. mud slides
400
What is one structure or behavior that snails and crayfish have in common?
hard shell, eyes, feelers, tail or hiding.
400
What is one way that an animal can change its environment in a beneficial way?
A beaver damming a river provides more habitat to fish.
500
Why is it important to have several shelters in a crayfish habitat?
Because crayfish are territorial and will fight to protect their territory
500
Name one way that humans change their environment.
They build buildings, cut down trees, turn forests into farmland, plant trees, litter, etc.
500
Which of the following things can NOT change their environment?
A. people
B. rocks
C. redwoods
D. snails
B. rocks
500
Name one structure or behavior that snails and crayfish don't have in common.
antennae, foot, sliding vs. walking/swimming, hiding inside the shell, pincers, etc.
500
Name an adaptation that would help you survive in a pond environment. Be ready to explain/defend it.