Carefully examine the facts about contemporary Hawthorne and Maggot flies that a
ID: 23487 • Letter: C
Question
Carefully examine the facts about contemporary Hawthorne and Maggot flies that are listed below. Indicate whether each biological characteristic will serve as a selective force for or against continued divergence of these two races.*******(write "FOR", "AGAINST", or "NEITHER" in each blank.)********
A. Hawthorn and Apple maggot adult flies are morphologically undistinguishable to us and presumably to each other. _______
B. Fidelity to fruit type is strong and Hawthorn maggot flies in the laboratory prefer to lay in Hawthorn fruit and Apple maggot flies prefer to lay in apples. _______
C. Hawthorn and apple maggot flies can be distinguished genetically and there is evidence that the genetic divergence between them has increased. ________
D. Both types of maggots survive better in Hawthorn fruit, 52% of all maggot fly eggs survived in Hawthorn fruits and 27% of maggot fly eggs survived in apple fruits. _______
E. Apple maggots bear 70% fewer eggs that are parasitized by wasps than do hawthorn maggots, but caterpillars and weevils may also feed on the larger apple, reducing the quantity of food available to apple maggots. ________
Explanation / Answer
A. Against B. For C. For D. Against E. Neither