ENTM 1000 Questions with Verified Correct
Answers
Do lecture 1-9
Why do insects move/migrate?
resources, avoid crowding, escape predators, habitat loss whether by natural causes or human
What are the only invertebrates that can truly fly?
Insects
What is ballooning?
a way to fly by catching air, some caterpillars do this
How long ago did the first insects fly?
400 million years ago
What is wing polyphenism?
different phenotypes of wings (morphs) determined by
environmental conditions look at alates and apterous adults in aphids
What triggers the response of alate production?
Day length and the coming of winter causes alate production in aphids. When day length is
14 hours alate production is at its max
non migratory flight
Used to find daily resources
•Flight is responsive to local cues
•Flight duration is often short
, •Turns and stops are frequent
•Flights typically occurs within the Boundary layer...
• Flight type is directed
Migratory flight
used to find.... new resorces; ecological escape
• Flight is not responsive to local cues
• Flight duration is often long and persistent
• Turns and stops are infrequent
• Flights typically occurs within or above the Boundary layer...
• Flight type is directed or downwind
Why are monarch butterflies brightly colored?
Because they are toxic and when predators eat them they will remember that the brightly
colored thing will kill me
Where do monarchs roost for the winter? and what do they do?
- Roosts are communal on evergreen trees
- Eastern population in Mexican mountains
- Western population on coastal S. California
insects are in a reproductive diapause
•Not true hibernation, active on warm day
How do monarchs do spring migration?
Over-wintered insects fly north and lay eggs on milkweed, then die.
•Eggs give rise to "Generation 1" caterpillars.
•Directed flight up to 30km / h
Answers
Do lecture 1-9
Why do insects move/migrate?
resources, avoid crowding, escape predators, habitat loss whether by natural causes or human
What are the only invertebrates that can truly fly?
Insects
What is ballooning?
a way to fly by catching air, some caterpillars do this
How long ago did the first insects fly?
400 million years ago
What is wing polyphenism?
different phenotypes of wings (morphs) determined by
environmental conditions look at alates and apterous adults in aphids
What triggers the response of alate production?
Day length and the coming of winter causes alate production in aphids. When day length is
14 hours alate production is at its max
non migratory flight
Used to find daily resources
•Flight is responsive to local cues
•Flight duration is often short
, •Turns and stops are frequent
•Flights typically occurs within the Boundary layer...
• Flight type is directed
Migratory flight
used to find.... new resorces; ecological escape
• Flight is not responsive to local cues
• Flight duration is often long and persistent
• Turns and stops are infrequent
• Flights typically occurs within or above the Boundary layer...
• Flight type is directed or downwind
Why are monarch butterflies brightly colored?
Because they are toxic and when predators eat them they will remember that the brightly
colored thing will kill me
Where do monarchs roost for the winter? and what do they do?
- Roosts are communal on evergreen trees
- Eastern population in Mexican mountains
- Western population on coastal S. California
insects are in a reproductive diapause
•Not true hibernation, active on warm day
How do monarchs do spring migration?
Over-wintered insects fly north and lay eggs on milkweed, then die.
•Eggs give rise to "Generation 1" caterpillars.
•Directed flight up to 30km / h
