Question

Which of the following is not an insect?
A. Mosquito
B. Housefly
C. Spider
D. Butterfly

Answer 1

Hint: The largest group of insects found in the arthropod phylum family in which hexapod invertebrates are found in the form of insects. Mostly insects have three life stages: eggs, immature stage and adults. Insects are unable to increase the size by simply expanding the body parts because of the rigid body that is commonly known as an exoskeleton.

Complete answer: Spider belongs to the class Araneae and is not a part of the class Insecta. In insects, wings and antennae are present, but the spider does not have wings and antennae for flying. On the other hand, butterflies, mosquitoes, and houseflies have wings and antennae, as a result of which they are included in the category of insects. The extrude of silk, injection of venoms, chelicerae with fangs, eight legs and air-breathing are the main properties of a spider. Some species such as wolf spiders are the most dangerous species of the spider that are harmful to living organisms. But not all spiders are dangerous to humans. In the United States, mostly black widow spiders are to be found.
Therefore, the correct answer is option C.

Note: Many spider species have not been found, but there are a total 45,000 known species of spiders that play a very critical role in the world. Cannibal spiders look like pelicans. The phylum Arthropoda has the most number of organisms when compared to other classes.