Tag: structure of earthworm

Questions Related to structure of earthworm

Find out the wrongly matched pair.

zoology environmental science structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. Nephridia - Earthworms - help to remove nitrogenous wastes and maintain ionic balance

  2. Malpighian tubules - insects including cockroaches - help in the removal of nitrogenous wastes and osmoregulation

  3. Antennal glands or green glands - excretory organ in the abdominal part of crustaceans like prawns - perform the excretory function

  4. Protonephridia - Rotifers - primarily concerned with ionic and fluid volume regulation

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Correct Option: A

Earthworm respires by

zoology earthworm structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. Clitellum

  2. Ctenidia

  3. Moist skin

  4. Typhlosole

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Correct Option: C
Explanation:

Respiration takes place through the moist surface of the body of an earthworm. Moist surface aids in easy diffusion of gases. Haemoglobin is the respiratory pigment that helps in transportation of oxygen to different parts of the body. 

Clitellum is the glandular and non-segmented region in the body of an earthworm and is helpful in copulation. 
Ctenidia is the respiratory organ present in molluscs and some insects. 
Typhlosole is a part of the digestive system of an earthworm and increases the absorption and digestion region in the alimentary system.
So, the correct answer is option C.

Earthworm is:

zoology environmental science structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. Hermaphrodite

  2. Monoecious

  3. Dioecious

  4. Both (a) and (b)

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Correct Option: A

If non labelled diagram of earthworm is given, then which special character must be shown to include it in a specific phylum?

zoology earthworm structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. Eye

  2. Metamerical segmentation

  3. Clietlum

  4. Anus

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Correct Option: B

Which of the following animals body shows bilateral symmetry?

zoology earthworm structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. Star fish

  2. Jelly fish

  3. Earthworm

  4. Sponge

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Correct Option: A

In earthworm, pharyngeal, nephridia are present as three paired tuffs in the segments.

zoology environmental science structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. $3$rd, $4$th and $5$th

  2. $4$th, $5$th and $6$th

  3. $5$th, $6$th and $7$th

  4. $6$th, $7$th and $8$th

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Correct Option: A

Earthworm moves with the help of

zoology earthworm structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. Muscles

  2. Setae

  3. Parapodia

  4. Setae and muscles

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Correct Option: D
Explanation:

Earthworm is able to move with the help of combined efforts of muscles and setae. Both of them help in longitudinal and circular movement of the muscles. The coelomic fluid acts as a hydraulic skeleton in the body of an earthworm. It helps to provide stiffness to the body and relaxation of the muscles. Thus option D is correct. 

Parapodia is the organ present in polychaetes, marine worms and is helpful in their locomotion. It is absent in earthworms. So, the correct answer is option D.

Pheretima is

zoology earthworm structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. Arboreal

  2. Scansorial

  3. Fossorial

  4. Cursorial

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Correct Option: C
Explanation:

Pheretima is a fossorial animal that lives in moist soil burrows. In summer, when the topsoil is dry, earthworms burrow deep into the soil. The earthworm burrows are lined by slimy secretion of its body. Temperature regulation while others use the underground habitat for protection from predators or for food storage.

So the correct answer is "Fossorial".

Earthworm is

zoology earthworm structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. Nocturnal

  2. Diurnal

  3. Aquatic

  4. All the above

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Correct Option: A
Explanation:

Earthworm is a reddish brown terrestrial invertebrate that inhabits the upper layers of the moist soil rich in decaying matter. It is nocturnal and during the daytime, it lives in burrows made by boring and swallowing the soil.

So the correct answer is 'Nocturnal'.

Find the odd one out:

zoology earthworm structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. Balanoglossus

  2. Herdmania

  3. Saccoglossus

  4. Earthworm

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Correct Option: D
Explanation:

Earthworm belongs to phylum Annelida where as rest of the three belong to phylum Hemichordate. Hemichordates are said to be connecting link between chordate and non chordate because they have their half of the body with notochord whereas half is without notochord.