Question

Observations : Characteristics of Earthworm.
It has
(1) The body of earthworm is.........
and..........it has...,..
and.........
at the opposite ends
to.

(2) The body is.......

segmented, with about......to...... segment.
(3) A prominent brown-coloured band called.......is present in the anterior region of
the body covering the segments 14th, 15th and 16th.
(4) Earthworm is a.......
animal crawling in soil. It is said to be a..,........of...........
(5) It is used for..........
therefore they play an important role in solid .........​

Answer 1

Earthworm

The farmer’s friend, the humble earthworm is an annelid that helps retain the fertility of the soil. This is an invertebrate animal that lives mostly in the upper layer of the soil. The fecal deposits of the earthworm are called as worm castings. And, if you see these worm castings in the soil in your garden, then you can surely see a few earthworms if you dig into the soil. Scientifically, earthworms are known by the Genus name Pheretima. Read along to more about this terrestrial invertebrate.

Morphology of Earthworm

Earthworms have a reddish brown color with a cylindrical body. The body is also elongated and is pointed in the anterior region, while the posterior region is rounded. The body is segmented and there are about 100 to 120 metameres or short segments. There is a dark median mid-dorsal blood vessel that is seen on the dorsal surface of the body. The ventral surface of the body has genital openings or pores.