1. What do mayfly nymphs feed on?
a) Algae
b) Small aquatic insects
c) Plant debris
d) All of the above
2. How long do adult male mayflies live after mating?
a) A few days
b) A few weeks
c) Several months
d) They do not survive after mating
3. How many tails do adult mayflies have?
a) 1
b) 2
c) 3
d) 4
4. How many wings do adult mayflies have?
a) 1 pair
b) 2 pairs
c) 3 pairs
d) 4 pairs