Question

An insect differs from a spider in which one of the following ways:
A. Insects have three pairs of legs and two pairs of wings while spiders have four pairs of legs and no wings.
B. Insects have four pairs of legs and a pair of wings while spiders have four pairs of legs and no wings.
C. Insects have three pairs of legs and three pairs of wings while spiders have three pairs of legs and no wings.
D. Insects have four pairs of legs and two pairs of wings while spiders have three pairs of legs and no wings.

Answer 1

Hint: Spiders and insects are both invertebrate organisms belonging to the phylum Arthropoda of the animal kingdom.
Spiders are members of the class Arachnida whereas insects belong to the class Insecta of the phylum Arthropoda.

Complete answer: A ‘class’ is essentially is a group of organisms related to each other. Spiders happen to be more closely related to other animals placed in the class Arachnida such as scorpions, as compared to insects.
Although both spiders and insects share a common ancestor which is why both belong to the same phylum.
Spiders (and other arachnids) are characterized by the presence of eight legs, whereas insects possess only six legs. Another, the major differentiating factor between arachnids and insects is the fact that insects have only two pairs of wings attached to the second and third thoracic segments, whereas spiders have no wings.

In the given below diagram, the left image is of a spider while the right image is of an insect.

>So, the correct answer is option A. Insects have three pairs of legs and two pairs of wings while spiders have four pairs of legs and no wings.

Note: Additionally, spiders possess two extra pairs of appendages positioned right in front of their legs. The pair located nearest to the mouth is known as chelicerae; the lower part of which appears like fangs, which release venom (in some species).