Some examples of worm-like creatures found in different ecosystems include earthworms in soil, nematodes in water and soil, and leeches in freshwater environments.
What do you mean by "wormlike structures"? Am not sure what you are asking.
small wormlike limbless amphibians
why would you want to when they improve the soil ? There are other wormlike creatures that are grubs, and you would want to carefully eradicate those by picking them out of the soil. If you use a pesticide, you risk killing the earthworms which are beneficial to your soil.
The wormlike sac that outpockets from the cecum is the vermiform appendix. It is a small, finger-shaped pouch attached to the cecum, a part of the large intestine. Although the appendix has no known essential function, it can become inflamed and infected in a condition known as appendicitis.
Jellyfish.
A caterpillar hatches from the butterfly's egg.
Since all trilobites are extinct it is not possible to answer this question. However it is believed that most fed on dead or dying material as well as some species of ancient wormlike creatures. most trilobites would have been too large to live on brine shrimp, they were 10 to 25 inches long.
Bombatus ursinus goes through three stages after hatching: Barva - a large brown, wormlike stage, predating on bucalypts. Bupa - a dormant stage, also known as a bhrysalis. Adult bombat - about 700 mm from snout to tail with a shuffling gait. These creatures live in burrows, and eat shoots and leaves.
The wormlike sac that outpockets from the cecum is called the appendix. It is a small, finger-shaped pouch located at the beginning of the large intestine. The function of the appendix in humans is not entirely clear, but it is believed to play a role in the immune system. Inflammation of the appendix, known as appendicitis, can be a medical emergency and may require surgical removal.
The wormlike stage in a moth's life cycle is called the catapillar
earthworms, polychaete worms, and leeches, rag-worms
You are possibly thinking of the movements called peristalsis which pass along your gut. Peristalsis is a wave of contraction and relaxation of circular and longitudinal muscles which passes along the wall of the gut. Its function is to push food along.This movement could be described as similar to the contraction and relaxation of muscles in the body wall of worms during locomotion.