Chemistry, Physics. the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound. Chemistry. a quantity of a substance, the weight of which, measured in any chosen unit, is numerically equal to the molecular weight; gram molecule.
Crickets are omnivores and will eat fruit, seeds, leaves, other insects, nectar and parts of dead animals. While they are agricultural pests that will eat crops and seeds, this occurs rarely. Overall, crickets are not bothersome to humans.
Adult dragonflies eat other flying insects, particularly midges and mosquitoes. They also will eat butterflies, moths and smaller dragonflies. There is one Asian species which eats spiders from their webs! The larvae, which live in water, eat almost anything living that is smaller than themselves.