Final answer:
Common insects that can be bothersome to humans include mosquitoes, house flies, cockroaches, and ants. Insects show exceptional biological diversity, with some undergoing complete metamorphosis and others showing intricate social behaviors like the use of pheromones. While they can cause harm, their ecological role, particularly in pollination, is crucial.
Step-by-step explanation:
Among the various insects that can be bothersome to humans, some common examples include mosquitoes, which are notorious for spreading diseases like malaria, and house flies or blow flies, that are often associated with contaminating food and surfaces. Insects such as cockroaches invoke discomfort due to their association with unclean environments, and ants, although essential in ecosystems, can become pests when they invade homes seeking food. Apart from these, there are numerous other insects that interact with humans, including beneficial ones like bees that are crucial for pollination. The insect world is incredibly diverse, with species like dragonflies, beetles, and butterflies undergoing complete metamorphosis from larvae, while others such as crickets develop through incomplete metamorphosis.
Insects as a group, also known as Hexapoda, exhibit a wide range of morphologies and behaviors, including complex social structures in species like termites and ants. These social insects use pheromones to communicate and maintain their colony's structure.
Interactions with insects can be detrimental as well; apart from spreading diseases, they can damage crops. Yet, their role in ecosystems is indispensable, as many plants would not be able to reproduce without insect pollination.