Why is a spider not an insect?
Insects are arthropods, the largest single group of animals on earth. Arthropods are small invertebrates.
Invertebrates are animals without a backbone. There are about 900,000 known species of insects in the world, and thousands of new ones are identified every year.
An insect does not have a skeleton inside its body. Instead, it has an outer covering called an exoskeleton.
An exoskeleton is a protective covering constructed of jointed plates and segments.
Insects have three body sections, six legs, two antennae, and special eyes. Some insects have one or two pairs of wings, and others do not have any wings.
Many people think of spiders as insects. A spider is not an insect. Do you know why? A spider has eight legs and a body made of two parts.
Question 4 options:
It has eight legs and a body made of two parts.
It does not have antennae.
It is not an arthropod.
It has an exoskeleton.