Question

The embryonic development in nematodes can have up to __________ larval stages.

a. one

b. two

c. three

d. four

Short answer

Option D is the correct answer.

Step-by-step solution

Introduction

Depending on the species under consideration, nematodes use a range of reproduction techniques, from monoecious to dioecious to parthenogenic. Internal fertilisation occurs, and embryonic development begins almost immediately.

The explanation for the correct answer.

Nematodes typically go through three stages in their life cycle: an embryonic stage, four to five larval stages, and an adult stage, all of which are separated by moulting. After each moult, a larva's body size grows until it reaches sexually mature adult size. Many nematodes have developed specific developmental stages, such as the dauer stage, which causes the larva to undergo developmental arrest in order to survive unfavourable circumstances like a lack of food or a high population density.

The explanation for the incorrect options.

The rest of the options are irrelevant since the answers are factual in nature.