Question

Please do all

00 points puI statoests (2 pts) ¡Most monogeneans are external parasites of 4. Poljchaetes crawi by means of leg-lile PataPedianwhich also serve in respiration. (2 pts) snuche chemoreceptive for food gathering. (2 pts) organs are ciliated sensory pits or slits that appear to be Since flatworms and ribbon worms lack a coelom or a pseudocoel, they are ter med animals. (2 pts) 7. The anterior-most and posterior-most portions of the annelid body are the and pygidium, respectively. (2 pts) boy ve rs fomium , The tongue-like, rasping organ in the head of many molluss isthe adul a (2 Pts) 9. Differentiation of a head end (found mainly in bilaterally symmetrical animals) is called aisatisn (2 pts) 10, The stages in the life cycle of a holometabolous insect are egg, larva, Wings of butterflis, Orderympetri Wings of buterfies, Orderyaeltheesa are covered with minute scales. (2 pts) 11 Correctly fill in the chart below scoring the traits (1-4) as 0 for absent and 1 for present. (8 pts) Mantle (1) Radula (2) Trochophore TAXON Veliger larva (4) Larva (3) Gastropoda Polyplacophora Bivalvia Annelida 2 12. Now place the taxa and the traits from above on a tree below that you draw so that is the most parsimonious tree. 4 pts f3

Answer 1

3 . skin , gill and fin of fish.

4. parapodia.

5. nuchal in interstitial.

6. acoelomate.

7.prostomium.

8.radula.

9. cephalization.

10. pupa.

Lepidoptera.

11.

Taxon	Mantle(1)	Radula(2)	Trochophore larva(3)	Veliger larva(4)
Gastropoda(A)	1	1	1	1
Polyplacophora(B)	0	1	1	0
Bivalvia(C)	1	0	1	1
Annelida(D)	0	0	1	0

12.