Question

Why are butterfly placed in class insecta whereas scorpions are placed in class arachnida?​

Answer 1

Answer:

The main difference between the two is that arachnids have eight legs (four pairs of legs) while insects have six (three pairs of legs).

Insects’ bodies are split into three main components: the head (where the eyes, mouth and antennae are found), the thorax (middle section where the legs and sometimes wings are attached) and the abdomen (includes the reproductive organs, gut and sometimes stingers). Arachnids, on the other hand, have only two: the cephalothorax (the head and thorax fused together) and the abdomen.

Another clear difference is that arachnids don’t have antennae or wings – all insects, though, have antennae, and also have wings.

Unlike insects, arachnids do not undergo some form of metamorphosis, which is when the larvae transform into an adult. Instead, arachnids grow into their adult shapes

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Answer 2

Answer:

The butterfly is placed in class Insecta whereas scorpions are placed in class Arachnida.

Explanation:

If we want to know why the butterfly is placed in class Insecta, whereas scorpions are placed in class Arachnida, then we have to know the differences between these classes.

• In the class Insecta, the body is divided into three parts- head, thorax, and abdomen. Thorax has always three pairs of jointed legs known as Hexapoda. But in the class Arachnida, the body is divided into two parts, one is the cephalothorax (which bears 4 pairs of walking legs, one pair of forceps-like chelicerae for capturing prey, and one pair of pedipalpi for reproduction), and the abdomen
• In the class Insecta, excretion is by Malpighian tubules. In the class Arachnida, the excretion is by Malpighian tubules or coxal glands.
• Class Insecta have one pair of antennae. Example- butterfly, honey bee, mosquitoes, etc. Whereas, Arachnida has no antennae. Example- spider, scorpion, cattle tick, etc.

So, now we can say that these are the reasons behind placing butterflies in class Insecta and scorpions in class Arachnida.