WorksheetsMacroinvertebrates
Total questions: 5
Worksheet time: 3mins
What is the adult form of this insect nymph?
Earwig
Dragonfly
Stonefly
Scorpionfly
In its aquatic larval stage, the caddisfly protects itself by building a protective case out of gravel, sand, twigs, and bitten-off pieces of plants. How does it bind these materials together underwater?
With mud and silt
By wrapping them in leaves
Using sticky saliva
With a silk protein excreted by specialized silk glands
All of the following are true about the stonefly except:
Each female may produce as many as 6,000 eggs, which are dropped in masses into a stream
The aquatic nymph does not have gills
The nymphal stage lasts from one to four years
The adults live several weeks
Which of the following is true about the mayfly?
Swarms of mayflies are so dense that thy can be picked up on weather radar
At about the same time, millions of mayfly nymphs will hatch and emerge as aquatic larvae
Mayflies can live for several years in their aquatic adult form
Once they emerge of water, and moult into their terrestrial adult form, mayflies only survive for one day
All of the above
Select the factors that represent indicators of good or poor water quality in freshwater aquatic systems.
pH
dissolved oxygen
nutrients like nitrogen and phosphorous
presence or absence of particular biological organisms
