Arthropods are found in virtually every known marine (ocean-based), freshwater, and terrestrial (land-based) ecosystem, and vary tremendously in their habitats, life histories, and dietary preferences.

What does molting enable arthropods to do? air. its new exoskeleton is soft. head, a thorax, and an abdomen.

Echinodermata Overview Echinoderms are secondarily radially symmetric – their ancestors were bilaterally symmetric. The adult radial symmetry is pentamerous, with body parts occurring in fives or multiples of five.

Arthropods have a segmented body, a tough exoskeleton, and jointed appendages. pick the letter of each sentence that is true about arthropod exoskeletons. The exoskeletons of many land-dwelling species have a waxy covering.

Classification – Insects Orders Illustrated (3-6th)

• Kingdom – Animals.
• 1) Beetle Order – Coleoptera.
• 2) Mantid & Cockroach Order – Dictyoptera.
• 3) True Fly Order – Diptera.
• 4) Mayfly Order – Ephemeroptera.
• 5) Butterfly & Moth Order – Lepidoptera.
• 6) Ant, Bee, & Wasp Order – Hymenoptera.
• 7) Dragonfly Order – Odonata.

Overview of Orders of Insects

• Order Lepidoptera – Butterflies and Moths.
• Order Coleoptera – Beetles.
• Order Hemiptera (Suborder Heteroptera) – True Bugs.
• Order Orthoptera – Grasshoppers, Crickets, Katydids.
• Order Mantodea – Mantids.
• Order Blattodea – Cockroaches and Termites.

A flight of insects, a plague of insects, a swarm of insects, a horde of insects, a rabble of insects. An army of ants, a colony of ants, a nest of ants, a bike of ants, a swarm of flying ants.

Of the 24 orders of insects, four dominate in terms of numbers of described species; at least 670,000 identified species belong to Coleoptera, Diptera, Hymenoptera or Lepidoptera….Diversity.

Insect, (class Insecta or Hexapoda), any member of the largest class of the phylum Arthropoda, which is itself the largest of the animal phyla. Insects have segmented bodies, jointed legs, and external skeletons (exoskeletons).

For an entomologist, classifying an insect consists of placing it in different taxonomical categories that correspond to different degrees of precision. In general, the most commonly used categories are phylum, class, order, family, genus and species.

Most insects have five basic physical characteristics:

• Insects have what we call an exoskeleton or a hard, shell-like covering on the outside of its body.
• Insects have three main body parts: head, thorax, and abdomen.
• Insects have a pair of antennae on top of their heads.
• Insects have three pairs of legs.

Insects come in all shapes and sizes—there are millions of different species found all across the globe. Most of them come from one of seven main groups: beetles, bees and their relatives, bugs, flies, butterflies, crickets, and dragonflies.

The largest group of insects that has been identified and classified is the order Coleoptera (beetles, weevils, and fireflies), with some 350,000 to 400,000 species. Beetles are the dominant form of life on Earth, as one of every five living species is a beetle.

It is believed that insects are so successful because they have a protective shell or exoskeleton, they are small, and they can fly. Their small size and ability to fly permits escape from enemies and dispersal to new environments.

Ant

Answers for Why are arthropods the most successful animal group on the planet?

1. Exoskeleton. – the chitin prevents desiccation/water loss.
2. Diversification of segmentation.
3. Diversification of appendages.
4. Advanced sensory system.