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Answers Ws 28-4 Insects and Their Relatives p. 622 Name: 1. What is unusual about the subphylum Uniramia? today 2. 3 major groups in this subphyla are? Centipedes, millipedes, insects Uni = 1 1 pair of antennae, appendages that do not branch ramus = branch 5. How is this different then crustaceans? 6. Where do most Uniramians live? D: More species then all other groups of animals alive 3. List the 2 major characteristics about the subphyla Uniramia. 4. What does Uniramia mean? B: An appendage with 2 branches; often a gill and a leg Land (terrestrial), some marine, few fresh water 7. Which 2 classes of the phyla arthropoda are quite small in number? Centipedes and millipedes 8. Give 2 characteristics of the 2 classes centipedes and millipedes. leg bearing segments Long, wormlike, body with many 9. Fg 28-25. What is the major difference in structure? 2 pairs of legs per segment vs 1 pair of legs per segments 10. Why do these organisms live in moist areas? from their bodies Cant close their spiracles and therefore lose water easily 11. Some typical centipedes might eat…. Arthropods, earthworms, toads, small snakes, mice 12. How many pairs of legs per segment are there in the class centipede? 1 pair 13. The main weapon of the centipede is located on the first segment. What is it? Poison claw 14. How many more legs does a millipede have compared with a centipede? 2 times 15. Where do organisms in the class millipede live? 16. What do they eat? Damp, places under rocks and in rotting logs Dead and decaying plant material 17. 2 ways that some in this class defend themselves are…. 18. How many different species in the class insect? Role into a ball, release unpleasant smells or toxins 900 000 19. 2 main characteristics of the class insecta are… 3 body segments (head, thorax, abdomen), 3 pairs of legs attached to the thorax 20. 4 additional characteristics of this class often are…… 1 pair of antennae, 1 pair of compound eyes, 2 pairs of wings attached to the thorax, breathe through tracheal tubes 21. What does insect mean in latin? Insectum = notched body 22. Fg 28-26. 6 main parts of an insect are…. Wings, antenna, head, thorax, abdomen, compound eye 23. How many pairs of appendages are used in mouthparts? 3 Page 1 of 2 01/04/2013 11:38 PM Document1 24. Fg 28-27; give the specific function of each of the 3 insects shown. Grasshopper; cut & chew plants, moth; long tube for sucking nectar, housefly; soaking up food 25. Other uses of insect legs include; spines and hooks for holding onto things, defense, jumping, capturing and holding prey 26. List the only 3 groups of organisms that can fly. Birds, bats, insects 27. Fg 28-28. Which insects have 1 pair of wings that are not used for flight? Beatles, may bugs 28. What organelle allows some insects to fly so well? Over sized mitochondria in the muscle tissue 29. What is the temperature inside the wing muscle cells? 35 C 30. What is a society? Separate individuals are dependent on one another for survival 31. What is a caste? Type of individual within a society that performs a specific task 32. Fg 28-29. Why are worker leaf-cutter ants carrying leaves and flower petals? will eventually eat 33. How many castes are shown in fg 28-30? To feed fungus that they 4 34. What happens to the successful reproductive bee male after it mates? 35. What gender are the workers in ant, bee, and wasp colonies? Dies Female 36. What is a glow-worm? Female, wingless firefly 37. What is a pheromone? same species Chemical that affects he behavior & / or development of other individuals of the 38. List some of the signals a pheromone can signal in an insect society. presence of food Alarm, death of a member of the colony, 39. Why do ants drag their abdomens along the ground when they have found food? indicates the path of the food 40. Why do queen honeybees release the pheromone queen substance? eggs 41. fg 28-31, how far away can moths detect pheromones? 42. fg 28-32. What are the bees doing? Release pheromones that Prevents worker bees from laying Several km Communicating the location of food through dance Page 2 of 2 01/04/2013 11:38 PM Document1