Lab 6 & 7 (Phylum Annelida & Nematoda)

What features of sandworms would lead you to believe that they are free-living predators? *Select all that apply a) Sensory structures on the head b)parapodia used in locomotion c)no structures for attaching to host d)fangs for capturing and subduing prey

All of them are correct: a) Sensory structures on the head b)parapodia used in locomotion c)no structures for attaching to host d)fangs for capturing and subduing prey

6) Do leeches possess setae? (yes or no) How do they move? (a, b or c?) *select all that apply a) they move using the anterior and posterior suckers to attach to the substrate and loop their bodies along like inchworms b) they swim when in water c) they use their setae

No, A&b

2. What's the function of the acicula in Polychaetes?

Structural support for setae

7. Which of the following is a trait that Platyhelminthes and Annelida share that is not found in Cnidaria? *Select all that apply a) Triploblastic development b) Complete digestive tract c) Coelom

a) Triploblastic development

7. Which of the following is found in both Annelida and Nematoda? *Select all that apply a) Metamerism b) Parapodia c) Longitudinal muscles d) Circular muscles e) Pseudocoel

a, c, &d

8. What is a habitat where nematodes are found and annelids are not found? *Select all that apply a) Inside plants b) Inside animals c) In soil d) In freshwater e) In ocean sediments

b

3. Body undulations, which help the polychaete worm to move rapidly, are produced by what muscles (if any ) ? a) muscles involved are only longitudinal like all other worm -like organism b) produced by the contraction of longitudinal muscles stimulated by the backward stroke of parapodium of a particular segment. c) accomplished by circular, longitudinal, and parapodial muscles and by coelomic fluid

b) produced by the contraction of longitudinal muscles stimulated by the backward stroke of parapodium of a particular segment. c) accomplished by circular, longitudinal, and parapodial muscles and by coelomic fluid

Nematode Questions: 1. Compare the motion of the vinegar eels that you observed to the motion that you saw in the live earthworms. What is the reason for the difference in the way the nematodes and earthworms move? *Select all that apply a)they both have longitudinal muscles so the differences are in the environment they live in b)no differences they move the same way c)nematodes only have longitudinal muscles, while earthworms have both longitudinal and circular

c)nematodes only have longitudinal muscles, while earthworms have both longitudinal and circular

3. Which of the following is an accurate description of the phylum Nematoda? It's members are...? *Select all that apply a) Morphologically diverse, diverse in way of life b) Not morphologically diverse, diverse in way of life c) Morphologically diverse, not diverse in way of life d) Not morphologically diverse, not diverse in way of life.

d) Not morphologically diverse, not diverse in way of life.