Arthropods with antenna use them for sensory functions, and commonly for the chemical sense (smell and taste). Antenna function differ for various species but often include detection of motion (vibration), touch, and heat.
To smell
Arthropods are a fairly wide-ranging classification of animals, covering everything from grub beetles to mosquitoes. One fairly common (though not universal) function of arthropods is to break down organic material into smaller molecules.
Antennae on some organisms can smell as well as feel.
The common function of antenna is sensory. In insects humidity is a big issue; but amongst arthropods they are used for touch, and the chemical sense of taste/smell, and some even use it to communicate.
Smell. Arthropods use their antennae to smell the air. Think of a male moth or mosquito's feathery antennae - those are mainly for sniffing out a female's pheromones, for example. Another is touch.
Yes, flies have exoskeletons. Flies are arthropods and all arthropods have an exoskeleton. More than 90% of creatures on earth are arthropods.
To look for common writing problems.
For one thing they eat other bugs, Spiders are considered lucky for that reason, even though some are horrified by them. These arthropods are part of the ecosystem where everything has a purpose. Arthropods are also very good and nutritious to eat.
Arthropods molt to grow and develop. Molting allows them to shed their exoskeleton and replace it with a larger one as they grow. This process is essential for arthropods to accommodate their increasing size and to continue their life cycle.
The body of arthropods is physically supported by an external skeleton (exoskeleton) made of a tough protein called chitin. Because it is inflexible, arthropods need to shed it entirely in order to grow in size.
There is only one function that both organ and plant systems have. The one thing organ systems and plant have in common is tissues.
There is only one function that both organ and plant systems have. The one thing organ systems and plant have in common is tissues.