Chapter 27, Problem 5STP

Summary Introduction

Introduction:

Insects belong to the phylum Arthropoda. They are the largest groups of invertebrates. Some insects can even swim in the water. Insects like bugs, water beetles, stoneflies, etc. can even live in water. The insects which are not specialized in water may also die in water. We can find variations in shapes, sizes, and types of insects that live in water.

Answer to Problem 5STP

Correct answer:

The correct answer is option (B) modified legs.

Explanation of Solution

Explanation/justification for the correct answer:

Option (B) modified legs. Insects use their legs to swim. They have modified legs which are long and it helps the insects to swim in the water. Normally, insects have short legs but the aquatic insects that can swim in water have long legs which help them in swimming. So, this is the correct answer.

Explanation for incorrect answer:

Option (A) compound eyes. Compound eyes help the insects to have a large view but poor resolution. It does not help with swimming. So, this is an incorrect option.

Option (C) sticky footpads. Sticky footpads in insects help them to stick their feet to the ground. This especially helps the spiders to build the webs and this does not help in swimming as sticky food pads will stick and won’t help in swimming. So, this is an incorrect option.

Option (D) sharp mouthparts. The Sharp mouthparts help in chewing food. It does not help in the swimming of the insects. So, this is an incorrect answer.