Which sequence correctly lists blow fly life cycle stages in order?

Which sequence correctly lists blow fly life cycle stages in order?

• A. Egg → Pupa → Larva → Adult
• B. Egg → Larva → Pupa → Adult
• C. Egg → Larva → Adult → Pupa
• D. Egg → Pupa → Adult → Larva

Answer: (B)

Blow flies undergo complete metamorphosis with four consecutive stages. Eggs are laid on a suitable substrate and hatch into larvae (maggots), which feed and grow through successive instars. After the final larval stage, they become pupae, a transformation phase inside a puparium. Finally, an adult fly emerges. This makes the sequence egg → larva → pupa → adult correct. Arrangements that place the pupal stage before the larval stage, or imply an adult appearing before completing metamorphosis, wouldn’t match how blow flies develop. Remember, the timing of each stage depends on temperature, which is why accurate PMI estimates rely on assessing the specific developmental stage present.

Blow flies undergo complete metamorphosis with four consecutive stages. Eggs are laid on a suitable substrate and hatch into larvae (maggots), which feed and grow through successive instars. After the final larval stage, they become pupae, a transformation phase inside a puparium. Finally, an adult fly emerges. This makes the sequence egg → larva → pupa → adult correct. Arrangements that place the pupal stage before the larval stage, or imply an adult appearing before completing metamorphosis, wouldn’t match how blow flies develop. Remember, the timing of each stage depends on temperature, which is why accurate PMI estimates rely on assessing the specific developmental stage present.