Which percentage of all known animal species are arthropods?

One of the most important adaptations that contributes to animal complexity is...

When did the earliest ancestor of all segmented animals (including us) live?

How are earthworms useful to the environment and us?

This animal is a parasite.

How is the middle segment of an insect called?

How is hard outer coating of arthropods, made of chitin, called?

What is the meaning behind the name of phylum Arthropoda?

Arachnids have a cephalothorax, which means they have...

Subgroup of Arthropoda called Myriapoda includes...

There is more species of insects than all other animals combined.

Scientists believe that insects have split from their __________________ relatives 410 million years ago.

How were certain insects that lived 320 million years ago able to grow to extreme sizes?

Many insect species have coevolved (evolved together) with...

Just like bats and birds, insects develop their wings from front walking legs.

Partial metamorphosis involves multiple stages of young that are quite similar to adults. They are called...

What is the name of a stage of complete metamorphosis in which an insect is closed in a protective case where it changes completely?

Select all examples of crustaceans.

Lobsters and crayfish have _____ pairs of appendages that serve many different purposes.