Question

Earthworm has no special sense organs, still they are sensitive to _______________.

• A. Light and sound
• B. Touch and sound
• C. Touch, taste and light
• D. Touch, taste,light and vibrating

Answer 1

The correct option is D Touch, taste,light and vibrating

Earthworms rely most heavily on their sense of touch. Nerve endings cover the worm's entire body so that he can feel vibrations and different textures in his surroundings. Their sense of touch helps worms avoid predators and safe conditions.

Tiny sensory organs cover worms' bodies and provide their sense of taste. These organs are called chemoreceptors, and they help worms detect chemical sensations, which translate into taste reception. Worms also use these chemoreceptors to smell the air and their potential food source. While worms have no eyes, they are still able to sense (and avoid) the presence of light. Since sunlight is dangerous and can dry out worms' skin, this sense is especially important for their survival.

Worms have no external ears, so their sense of touch and vibration receptors compensate for their lack of hearing.

So, the correct option is 'Touch, taste,light and vibrating'.