Insect Biology & Identification Flashcards
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Read the first 7 Insect Biology & Identification flashcards as text
The fat body in insects serves a function most analogous to which organ in vertebrates?
Answer: Liver and adipose tissue
The insect fat body stores energy reserves and performs metabolic functions including detoxification, much like the combined role of the liver and fat tissue in vertebrates.
Which order includes insects known as 'true bugs,' characterized by hemelytra (partially thickened forewings)?
Answer: Hemiptera
Hemiptera (true bugs) have distinctive hemelytra — forewings that are thickened at the base and membranous at the tip — and piercing-sucking mouthparts.
In ants and bees, the petiole refers to:
Answer: The narrow waist segment connecting thorax and abdomen
The petiole is the constricted node or nodes between the thorax (mesosoma) and gaster (abdomen) in Hymenoptera, giving them their characteristic narrow waist.
Which of the following is a defining characteristic of insects compared to other arthropods?
Answer: Possessing three pairs of legs and three body regions
Insects (Class Insecta) are uniquely defined among arthropods by having exactly three pairs of jointed legs and three body tagmata: head, thorax, and abdomen.
Tympanic organs in insects are used primarily for:
Answer: Sound reception (hearing)
Tympanic organs are specialized hearing structures found in several insect orders including Orthoptera, Lepidoptera, and some Hemiptera.
Hypermetamorphosis, as seen in blister beetles (Meloidae), differs from typical holometabolism because:
Answer: The larva passes through distinctly different larval forms (instars with different morphologies)
In hypermetamorphosis, the insect goes through multiple larval forms that are morphologically distinct from one another, such as the active triungulin first instar giving way to grub-like later instars.
The Malpighian tubules in insects function similarly to which human organ?
Answer: Kidneys
Malpighian tubules filter metabolic waste from the hemolymph and pass it to the hindgut for excretion, performing the excretory function analogous to mammalian kidneys.