<span>Blowflies burrow into the ground at the completion or, 4th instar stage (17 mm size,) of their larval growth. After burrowing into the ground, the larvae transform into the pupal stage. They remain underground in the pupal stage for 6 to 8 days at which time the adult fly emerges.</span>
Answer: D I’m pretty sure
Explanation:
Answer;
Phylum Nematoda.
The heartworms belongs to the phylum Nematoda.
Explanation;
-Phylum Nematoda are un-segmented organisms with anterior lateral chemosensory organs (amphids) and with a persistent blastocoel or pseudocoelom; dorsal and ventral nerve cords in epidermis and excretory system of renette cells or tubules.
-The alimentary canal is provided with distinct mouth and anus (complete digestive tract).