Insect Classification, Behavior, and Ecology

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Questions and Answers

Which of the following characteristics is LEAST useful when classifying insects?

Wing venation patterns.
Number of antennae segments.
Body size. (correct)
Mouthpart morphology.

A scientist observes a group of insects exhibiting complex social behavior, including division of labor and overlapping generations within a nest. To which order do these insects MOST likely belong?

Coleoptera.
Diptera.
Lepidoptera.
Hymenoptera. (correct)

How might the removal of a keystone insect species impact an ecosystem?

Result in a more stable and resilient ecosystem.
Lead to an increase in the diversity of plant species.
Cause a trophic cascade affecting multiple levels of the food web. (correct)
Have no significant effect due to the redundancy of ecological roles.

Which adaptive advantage do phytophagous insects gain from specialized mouthparts?

Greater access to a specific plant's resources, allowing niche specialization. (B) Signup and view all the answers

In what way do insect pollinators benefit from their relationship with flowering plants?

They receive a consistent supply of nectar and pollen. (B) Signup and view all the answers

What is the PRIMARY function of Johnston's organ in insects?

Detecting vibrations and air currents. (A) Signup and view all the answers

An insect larva that possesses prolegs in addition to its six true legs MOST likely belongs to which order?

Lepidoptera. (A) Signup and view all the answers

How does the exoskeleton of an insect contribute to its success in terrestrial environments?

Prevents water loss and provides physical protection. (A) Signup and view all the answers

What crucial role do detritivorous insects play in an ecosystem?

Decomposition and nutrient cycling. (D) Signup and view all the answers

Why is understanding insect behavior important for agricultural pest management?

It allows for the development of more effective and targeted control strategies. (A) Signup and view all the answers

Flashcards

Insecta Class

Insects belong to the class Insecta, characterized by a three-part body (head, thorax, abdomen), six legs, compound eyes, and usually two pairs of wings.

Phylogenetic Classification

Categorization based on evolutionary relationships, grouping organisms with similar characteristics and ancestry.

Innate Behavior

Behaviors influenced by genetics, performed without prior experience, such as reflexes or instincts.