Dichotomous Keys

Front

What is a dichotomous key?

Back

A dichotomous key is a tool that allows the identification of organisms through a series of choices that lead the user to the correct name of a given item.

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How does a dichotomous key work?

Back

A dichotomous key works by presenting two contrasting statements or questions at each step, guiding the user to the next step based on their observations.

Front

What are the main characteristics of arachnids?

Back

Arachnids typically have eight legs, two body segments (cephalothorax and abdomen), and no antennae.

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What distinguishes insects from arachnids?

Back

Insects have three body segments, six legs, and usually possess antennae, while arachnids have two body segments and eight legs.

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What is the significance of the presence of antennae in insects?

Back

Antennae are sensory organs that help insects detect environmental cues such as smell and touch.

Front

What is a propodus in crabs?

Back

The propodus is the main segment of a crab's claw, often enlarged in species like fiddler crabs.

Front

What is the function of eyes on stalks in fiddler crabs?

Back

Eyes on stalks allow fiddler crabs to have a better field of vision and to spot predators more effectively.

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What are the two pairs of wings in Lepidoptera?

Back

Lepidoptera, commonly known as butterflies and moths, have two pairs of scaly wings that are often colorful.

Front

What is the role of a dichotomous key in biology?

Back

A dichotomous key helps scientists and students identify and classify organisms based on observable traits.

Front

What is the difference between Coleoptera and Lepidoptera?

Back

Coleoptera, or beetles, have hardened forewings, while Lepidoptera have scaly wings.