Question

1. In earthworms, the exchange of gases takes place through
(a) The skin
(b) Both skin and lungs
(c) Buccal cavity
(d) Spiracles​

Answer 1

Answer:

I think the answer is option(a)

Answer 2

Answer

(a) The skin

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Explanation

In earthworms, the exchange of gases takes place through the skin as they don't have respiratory organs like human beings.

• They have no bons and eyes.
• They are multicellular organisms.
• They are free living.
• Sunlight can kill them as they are sensitive to UV rays.
• They belong to the Phylum Annelida and Kingdom Animalia.
• The segments of the earthworm's body is known as Annuli and they are separated by transverse dividing walls known as Septa. 
• They are brown in colour and body is tubular (tube like structure) in shape.
• They have full digestive system.
• They have closed circulatory system.
• They carry both male and female sex organs (hermaphrodites).