phylum tardigrada

Question 1

tardigrada means:

Answer 1

slow stepping

Question 2

what is the name of the unique life phase tardigrada can go into?

Answer 2

anabiosis and cryptobiosis

Question 3

tardigrada legs are:

Answer 3

unjointed and unsegmented

Question 4

tardigrada nervous system is tied to legs. how?

Answer 4

4 pairs of ganglia, 1 for each leg. + a brain

Question 5

tardigrada live where?

Answer 5

marine sediments, fresh water, damp moss/lichen

Question 6

tardigrada are __coelomates

Answer 6

eu. but it is reduced

Question 7

tardigrada excretion

Answer 7

3 pairs of malphigian tubes

Question 8

tardigrada malphigian tubes are:

Answer 8

branching tubes which come off from the gut, absorb water solutes, and waste from hemolymph

Question 9

tardigrada exterior is a ______. and what does it do?

Answer 9

cuticle. molts

Question 10

special about tardigrada mouth:
and what do they eat?

Answer 10

telescoping cone with 2 oral stylets that they use to pierce food. they eat diatoms

Question 11

tardigrada development:

Answer 11

direct!

Question 12

anabiosis vs cryptobiosis

Answer 12

anabiosis: metabolism drops, pull legs into body, lose water, secrete a cyst wall around themselves
cryptobiosis: more extreme form of anabiosis, enter a stage called a “tun” where they pack their cells with special molecules that protect the more sensitive parts. lose almost all water. no evidence of metabolic activity and can survive 100+ years, liquid N2, space vacuum

Question 13

what is a tardigrada “tun”?

Answer 13

the stage they go into during cryptobiosis where metabolic activity goes to almost 0