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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
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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
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