Answer — Exercise 1 - Part 1

b)

• Arthropods are animals with lots of hinged legs (legs with joints in them) and hard outsides, e.g. crustacea, spiders, and insects.
• They are important because they make up three quarters of all animals in the world. / They are the biggest animal group in the world.

c)

1. Examples of animals with a spine: bats, cats, rats, mammals, amphibians, fish, birds. He thinks they are less important because they make up only 2.9% of all species.
2. When he was on a field trip at university (for his first degree). Ants caught his attention.
3. Normally, new species are named after the country they are found in or how they look. He has five named after him.
4. Their habitat is being destroyed and they are disappearing very quickly, and we may never even discover some of them.