ecdocycoza

Question 1

how are lophotrochozoans different from ecdysozoans?

Answer 1

Unlike lophotrochozoans that grow continuously, ecdysozoans grow intermittently by molting

Question 2

how do they expand?

Answer 2

Once the animal molts, fluid causes the body to expand—then a new, larger cuticle or exoskeleton forms

Question 3

cuticle and exoskeleton

Answer 3

• Protect these animals from
  predators
• Provide an effective structure
  for muscle attachment

Question 4

nematodes “roundworms”

Answer 4

• Unsegmented worms with a pseudocoelom, no appendages, and an
  elastic cuticle that is molted during growth
• Lack specialized systems for exchanging gases and circulating nutrients (through body wall)

Question 5

nematodes can be bad they cause diseases that are ugly :(

Question 6

tardigrades “water bears”

Answer 6

• Have a hemocoel
• No respiratory organs
• Most species reproduce sexually
• Can be herbivores, bacterivores, carnivores
• Born with all their cells
• freshwater
• can survive some CRAZY stuff
  They are cryptobiotic organisms (stop or slow metabolism, then restart it)