When your stomach starts growling, do you ever yearn for toasted beetles or sauteed grubs? If those culinary selections turn your stomach, consider the fact that there are more than 1,400 edible insect species. Take the insect quiz for more creepy, crawly insect facts.
Insects make up what percentage of the world's animals?
40 percent
60 percent
80 percent
Insects make up approximately 80 percent of the total number of animals on Earth.
Correct Answer
Wrong Answer
Insects make up approximately 80 percent of the total number of animals on Earth.
Instead of internal skeletons, insects have exoskeletons -- tough outer coverings made up of several layers. The most rigid of these layers is composed of chitin, a horny, waterproof substance.
antennae
Correct Answer
Wrong Answer
Instead of internal skeletons, insects have exoskeletons -- tough outer coverings made up of several layers. The most rigid of these layers is composed of chitin, a horny, waterproof substance.
The simple eyes, or ocelli, are located on the head between the compound eyes. The ocelli aren't used for vision, but to detect changes in the intensity of light.
magnifying images
Correct Answer
Wrong Answer
The simple eyes, or ocelli, are located on the head between the compound eyes. The ocelli aren't used for vision, but to detect changes in the intensity of light.
Of the following, which body part do insects not have in common with humans?
lungs
Although insects breathe air, they don't have lungs. Instead, a system of branching air tubes, or tracheae, reaches all parts of the body. Air enters through openings called spiracles.
heart
esophagus
Correct Answer
Wrong Answer
Although insects breathe air, they don't have lungs. Instead, a system of branching air tubes, or tracheae, reaches all parts of the body. Air enters through openings called spiracles.
