ACE Insect Biology & Identification 4

Question 1

Which of the following best describes arrhenotoky, a reproductive strategy seen in Hymenoptera?

Accepted Answer

Unfertilized eggs develop into males (haploid); fertilized eggs develop into females (diploid)

Answer

Arrhenotoky is a form of parthenogenesis in which unfertilized, haploid eggs develop into males and fertilized, diploid eggs develop into females, as in bees, wasps, and ants.

Question 2

The term 'sclerotization' in insect biology refers to:

Accepted Answer

The hardening of the cuticle through protein cross-linking (tanning)

Answer

Sclerotization is the process by which insect cuticle is hardened and darkened through the oxidative cross-linking of proteins by quinones, particularly after molting.

Question 3

Entomologists use the term 'instar' to describe:

Accepted Answer

The insect between two successive molts

Answer

An instar is the developmental stage of an insect between two consecutive molts; a third-instar larva, for example, has molted twice.

Question 4

Which type of insect antenna is described as 'geniculate'?

Accepted Answer

Elbowed antennae with a distinct bend, as in ants and weevils

Answer

Geniculate antennae have a sharp bend or elbow at the junction of the elongated first segment (scape) and the remaining segments, characteristic of ants and weevils.

Question 5

The Johnston's organ in insects is located in the:

Accepted Answer

Pedicel of the antenna

Answer

Johnston's organ is a chordotonal sensory structure located in the pedicel (second antennal segment) that detects antennal movement, sound, and gravity.

(ACE) Associate Certified Entomologist Practice Test

(ACE) Associate Certified Entomologist Practice Test

ACE Insect Biology & Identification 4