Illinois Pesticide Applicator Practice Test

What are the four life stages of insects?

1. Egg, larva, pupa, adult

2. Egg, nymph, adult, larva

3. Caterpillar, pupa, adult, egg

4. Embryo, larva, nymph, adult

The correct answer is: Egg, larva, pupa, adult

The four life stages of insects typically include the egg, larva, pupa, and adult stages. This sequence reflects the process of complete metamorphosis that many insects undergo. During the egg stage, the insect begins its life cycle, often laid in various environments to ensure the next generation has suitable conditions for survival. Once hatched, the insect enters the larval stage, which is primarily focused on growth and feeding. This is often a caterpillar or grub-like form that may look vastly different from the adult. As the insect prepares to transition into its final form, it enters the pupa stage, during which it undergoes significant internal reorganization and transformation. This stage can often be observed in cocoons or chrysalises. Finally, the adult stage is when the insect emerges in its mature form, capable of reproduction and often exhibiting characteristics distinct from earlier stages. The other options either incorrectly include a stage that is not part of the typical life cycle in insects, like nymph or embryo, or refer to specific terms that do not universally apply to the majority of insect species. Hence, the sequence of egg, larva, pupa, and adult remains the most accurate representation of insect life stages in terms of complete metamorph