Sawfly larvae can be distinguished from Lepidoptera larvae by which feature?

Sawfly larvae can be distinguished from Lepidoptera larvae by which feature?

• A. They have six or more prolegs
• B. They possess two compound eyes
• C. They have crochets on prolegs
• D. They lack legs

Answer: (A)

The key idea is that the number of prolegs is a reliable way to tell sawfly larvae from caterpillars. Sawfly larvae typically have six or more pairs of prolegs on the abdomen, whereas Lepidoptera larvae (caterpillars) usually have five or fewer pairs of prolegs. This difference in how many abdominal leg-like structures they carry is a consistent, observable trait you can use in the field or lab. So the best choice highlights that six or more prolegs distinguish sawfly larvae from Lepidoptera larvae. The other options aren’t dependable diagnostic features for this distinction—eye type, the presence or absence of legs, or crochets on prolegs aren’t consistent enough to separate these two groups across taxa.

The key idea is that the number of prolegs is a reliable way to tell sawfly larvae from caterpillars. Sawfly larvae typically have six or more pairs of prolegs on the abdomen, whereas Lepidoptera larvae (caterpillars) usually have five or fewer pairs of prolegs. This difference in how many abdominal leg-like structures they carry is a consistent, observable trait you can use in the field or lab.

So the best choice highlights that six or more prolegs distinguish sawfly larvae from Lepidoptera larvae. The other options aren’t dependable diagnostic features for this distinction—eye type, the presence or absence of legs, or crochets on prolegs aren’t consistent enough to separate these two groups across taxa.