Final answer:
Nematodes have up to four larval stages in their embryonic development, designated as L1, L2, L3, and L4.
Step-by-step explanation:
In nematodes, the embryonic development can have up to four larval stages. These larval stages are known as L1, L2, L3, and L4. Between each larval stage, the nematode undergoes molting and ecdysis, which is the shedding of the old outer layer of cuticle.
The embryonic development in nematodes can have up to four larval stages. These stages are designated as L1, L2, L3, and L4. Additionally, under adverse environmental conditions such as overcrowding or lack of food, nematodes may enter an intermediate larval stage called the dauer larva, which is a sort of suspended development stage. However, the dauer larva is not considered a standard part of the larval stage count, so it remains that there are four main successive larval stages in nematode development.