ACE Insect Taxonomy & Classification

Question 1

Which insect order contains all beetles, making it the largest order of insects by number of described species?

Accepted Answer

Coleoptera

Answer

Coleoptera (beetles) is the largest insect order with over 400,000 described species, representing roughly 40% of all known insect species.

Question 2

What is the correct descending hierarchy of taxonomic classification used in entomology?

Accepted Answer

Phylum > Class > Order > Family > Genus > Species

Answer

The correct Linnaean hierarchy descends from Phylum > Class > Order > Family > Genus > Species, with Kingdom above Phylum.

Question 3

Insects in the order Diptera are distinguished from other winged insects by which characteristic?

Accepted Answer

Two functional wings with hindwings modified into halteres

Answer

Diptera (true flies) have only two functional wings; their hindwings are reduced to small club-shaped balancing organs called halteres.

Question 4

Which term describes insects that undergo complete metamorphosis with four life stages: egg, larva, pupa, and adult?

Accepted Answer

Holometabolous

Answer

Holometabolous insects undergo complete metamorphosis through four distinct stages — egg, larva, pupa, and adult — and include beetles, flies, wasps, and moths.

Question 5

The order Blattodea (cockroaches and termites) belongs to which broader taxonomic class?

Accepted Answer

Insecta

Answer

Blattodea is an order within the class Insecta, which is characterized by six legs, three body segments, and (usually) wings.

(ACE) Associate Certified Entomologist Practice Test

(ACE) Associate Certified Entomologist Practice Test

ACE Insect Taxonomy & Classification