d) lacking 7. The firt seo evve were the 18. The budy phan of tpods has s sintti
ID: 203392 • Letter: D
Question
d) lacking 7. The firt seo evve were the 18. The budy phan of tpods has s sinttion due 19. Tentacles of onidarians bear stinging celis caled 20. Tapewoms atlach to the digestive lining of the host bry means of their 21. The molluscan radula is used for d) Mollusca c) somite c) stylets d) scolex d) food uptake 4) 8 a) reproduction b) circulation c) locomotion 22. If you cant tel a squid from an octopus, count their tentacles A Squid bas a) 12 b) 10 c) 16 23. The only animal to have a closed ciroulatory system includes the a) snail b) oyster c) jellyfish c) be opened c) locomotion 24. If the adductor muscle of a scallop is relaxed, the shell will b) be lost a) be closed d) none of these 25. The gill of bivalves is used for a) reproduction b) excretion d) feeding 26. In echinoderms, water enters the water vascular system through the a) ring canal b) madreporite c) ampulla d) skin gills 27. Which of the following have tracheal system for the respiration? a) crabs c) spiders d) horseshoe crabs 28. Star fish move about by a) tube feet b) small pincher e) extruding slime ) movable spine 29. What is one of the major characteristics of the Platyhelminthest? a) rnadial symmetry b) cephalizationc) no tissues d) dorsal nerve losely related with spider? c) house flies 30. Which of the following organisms are c d) barnacles a) horseshoe crabs b) crabs are the lowest on the evolution tree? 31. Which of the following orgaissac Platybelminthes d) annelids a) star fish b) nematodes 32. Spicules are found in a) Porifera d) annelids b) cnidarianExplanation / Answer
Answer:
16) The symmetry of sponges is: d) Lacking (sponges are asymmetrical and lack any symmtery)
17) The first segmented animals to evolve were a) Annelids (Annelids were the first segemented animals to evolve around 600 million years ago)
18) The body plan of arthropods has a size limitation due to d) a chitinous exoskeleton ( the exoskeleton structure of arthropods places a limit on their size)
19) Tentacles of Cnidarians bear stinging cells called b) cnidocytes
20) Tapeworms attach to the digetive lining of the host by means of their d) Scolex
21) The molluscan radula is used for d) food uptake
22) If you cant tell a squid from an octopus, count their tentacles. A squid has b) 10
23) The only animal to have a closed circulatory system includes the d) Earthworm
24) If the adductor muscle of a scallop is relaxed, the shell will d) None of these
25) The gill of bivalves is used for
26) In echinoderms, water enters the water vascular system through the b) madreporite
27) Which of the following have tracheal system for respiration? b) grasshoppers
28) Star fish move about by a) tube feet
29) What is one of the major characteristics of the Platyhelminthes b) cephalization
30) Which of the following organisms are closely related with spider.
31) Which of the following organisms are lowest on the evolution tree
32) Spicules are found in a) porifera
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