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: Both invertebrates belonging to the phylum Arthropoda of the animal kingdom. Spiders and insects are members of the Arachnida class while insects are members of the Arthropoda Insecta class.

Complete answer: In essence, a "class" is an interlinked community of species. Spiders are more closely associated with other species, such as scorpions, than spiders, in the Arachnida class. While both spiders and insects have a common ancestor, both of them have the same phylum. The existence of eight legs, while there are only six legs for spiders (and other arachnids) is defined. The other big difference is that insects only have two pairs of wings attached to the second and third thoracic segments, while the spider does not have the wings. In the illustration below the left image is a spider, while the right image is an insect. Insects have three legs (six legs) and spiders have four legs (eight legs). Insects have two pairs of wings, but they have no wings in the second and third segments of the thoracic.
Therefore, option A which is insects have three pairs of legs and two pairs of wings while spiders have four pairs of legs and no wings is the right answer.

Note: There are two segments in the corps of an arachnid: the cephalothorax and the abdomen. Six legs of the insects; eight legs of the arachnids. Arachnids have simple eyes. Compound eyes. Insects have antennas; arachnids have no antennas. Spiders have two additional pairs of appendages located directly before the wings. The closest pair is called chelicerae; the lower portion is known as fangs releasing poison (in some species).