Question

Which of the following is not a member of class Insecta?
A. Musca
B. Cockroach
C. Louse
D. Spider

Answer 1

Hint: The members of the phylum Arthropoda have segmented bodies, jointed legs, and external skeletons. They are distinguished from other arthropods since their body is divided into head bearing mouthparts, eyes, and a pair of antennae, three-segmented thorax, which has three pairs of legs and segmented abdomen.

Complete answer:
Insect refers to pests, such as bedbugs, houseflies, clothes moths etc. Insects are sometimes used in investigations related to hormonal action, nerve and sense organ functioning, and several other physiological processes. They are used for checking the environmental quality and also help in assessing water quality, soil contamination. They are also considered as the basis of many studies of biodiversity. The orders that contain the greatest numbers of species are Coleoptera, Lepidoptera, Hymenoptera, and Diptera.
General characteristics of Insects (class):
> They make up more than half of all living things on Earth and are divided into 29 orders
> They are ubiquitous
Basic anatomy:
> Chitinous exoskeleton, no bones or a skeleton
> Three-part body: head, thorax, abdomen and three pairs of jointed legs.
> Possess compound eyes that contain several thousand lenses leading to a larger field of vision.
> Two antenna
> Most of them are solitary, however, few insects such as bees, ants and termites live in large, well-organized colonies.
> Communication occurs in many different ways: males can sense pheromones of female moths over distances of many kilometers (moths), sounds to attract mates (crickets).

Therefore, the correct option is D, spider.

Note:
> Many insects have the nose on their antennas and the ears on their legs.
> They can communicate in infra- and ultrasound spectra.
> Some can send out light.