Term |
Definition |
molting |
When an animal sheds its exoskeleton because it is increasing in size. |
regeneration |
the process a crayfish goes through to replace a lost body part |
scavenger |
an animal that hunts and eats dead plants on animals |
exoskeleton |
the outer hard protective covering that supports the crayfish arthropod |
swimmerets |
small limbs underneath a crayfish abdomen that move water to help breathing |
enviroment |
all the physical conditions that a living thing needs to survive |
stimulus |
An action that causes a response |
An example of stimulus |
When we tapped the crayfish on the back with an eraser |
response |
How an animal reacts to a stimulus |
An example of response |
The crayfish moved when it was tapped |
Crayfish senses |
sight, smell, touch, taste |
which sense is the crayfish missing? |
hearing |
why do crayfish molt? |
Crayfish molt because their bodies get bigger |
How do crayfish protect themselves from predators? |
Crayfish attack with pincers and quickly swim backwards. They get into a defensive posture (stand high on walking legs) or hide. |
Why can crayfish stay out of the water for long periods of time? |
Crayfish can track water under their carapace which keeps their gills moist. |
What is the difference between a male and female crayfish |
The female crayfish has one more set of swimmerets. |