Question
Mated pairs of bugs remain joined together long after sperm
transfer, but they must separate so that the female can lay the
eggs. Mated pairs stay joined well beyond sperm transfer. Do you
see evidence of competition for females?
6. How many generations of soapberry bugs could there be each
year ?
7. Why might you expect to see a difference in beak length
between males and females ?
8. Given the radius of a balloon vine seed capsule and
fitness of bugs with different lenghts under natural selection,
what beak length would be ideal for feeding on balloon vine fruits?
9. In a natural population of bugs living on balloon vine in
Baton Rouge Louisiana, female beak length ranged from 6.5 to 9.5 mm
with a mean at 8 mm. How well does this distribution fit your
expectation?
10. What fraction of available fruits could the bugs consume?
(Remember that the mean is the average size; sometimes the mode,
the most frequent type, is the same as the mean.)
11. Would having a beak much longer than the largest diameter
be more effective than having a beak equivalent to the average
capsule diameter? Yes or No.Explain. (Before you answer this
question, look at how the beak is carried on the body when the bug
walks and where the beak must be positioned to feed. Imagine moving
the beak into the feeding position and inserting it into a
seed.)
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