What is a skeleton outside of the body that protects.
200
Where do crayfish live?
What is shallow water, edge of a lake, pond, marsh, or stream.
200
Why do crayfish molt?
What is so they can grow larger.
200
Having male and female reproductive structures on separate individuals.
What is dioecious?
300
What are mandibles used for?
What is grinding food.
300
Crayfish are scavengers. What does this mean?
What is they eat already dead animals.
300
Why do crayfish need water in the pool?
What is for water and oxygen.
300
What is a stimulus?
What is something that causes a response.
300
Gathering of ganglia or nervous tissue in the head region.
What is Cephalization?
400
What are swimmerets?
What is thin legs used to swim, move water over the gills, and hold larva.
400
What does molting mean?
What is shedding their skin.
400
Crayfish are omnivores. What do they eat?
What is plants and meat.
400
What is a response?
What is a reaction to a stimulus?
400
Fused head and thorax
What is Cephalothorax?
500
What are the 2 main parts of a crayfish?
What are cephalothorax and abdomen.
500
Two crayfish fight. One loses a leg. They grow a new one. What is this called?
What is regeneration.
500
How can crayfish live out of water for a short time?
What is if their gills are moist they can get oxygen from the air.
500
Which trait is NOT inherited?
A. crayfish have 2 main parts
B. they molt to grow larger
C. they use gills to breathe
D. a crayfish has a missing pincer.