Question

about earthworms .........​

Answer 1

$\huge\bold\red{Earthworm}$

• It is a worm with segments all over its body hence Phylum: Annelida.

$\begin{lgathered}{\boxed{\bold{\green{{Features\:of\:phylum\:(Specific):}}}}}\\\end{lgathered}$

• Body is segmented, segments are called metameres.metameres.
• skin is moist.
• Chitinous setae, bristles, body wall muscles helps in locomotion.
• After 13th segment clitellum seen in Earthworm (14- 16 segment).

$\begin{lgathered}{\boxed{\bold{\green{{Adaptive\: Features}}}}}\\\end{lgathered}$

1) Earthworm lives in soil by making burrows in it. The cylindrical body helps in pushing the body into the soil.

2) it feeds on soil, the anterior end has prostomium which sense the soul and helps it to eat the soil and convert it into fertile soil hence called femer's friend.

3) Skin is always kept moist with the help of mucus glands, so soil does not stick to the body and helps the worm to breathe through the skin.

4) During rainy season the worms come out as burrows are filled with water. This is the mating time of worms .

5) It is hermaphrodite, both male and female genital pores are seen.

6) The segments on the body are called setae.

7) The brown colours helps it to camusflage with soil and protect form enemies .

Answer 2

Earthworms are underground creatures

An earthworm is a terrestrial invertebrate that belongs to the order Opisthopora. They exhibit a tube-within-a-tube body plan, are externally segmented with corresponding internal segmentation, and usually have setae on all segments. They occur worldwide where soil, water, and temperature allow