Tag: earthworm - morphology, integumentary system , respiration and nervous system

Questions Related to earthworm - morphology, integumentary system , respiration and nervous system

The first body segment of earthworm is 

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

  1. Peristome

  2. Peristomium

  3. Protostomrum

  4. Protostome

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Correct Option: B
Explanation:

The body of earthworm is made of about 100-150 segments. Segmentation help the earthworm move. Each segment or section has muscles and bristles called setae. The first segment is called peristomium.
So, the correct option is 'peristomium'.

Oxygenation of blood occurs through moist skin in.

zoology animal diversity - i (inverterbrate phyla) structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. Earthworm

  2. Octopus

  3. Squid

  4. Doris

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Correct Option: A
Setae help in locomotion in earthworm but are not uniformly present in all the segments. They are present in
zoology earthworm structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. 1st segment

  2. last segment

  3. clitellar segment

  4. 20th-22nd segment

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Correct Option: D
Explanation:

In each body segment of earthworm, except the first, last and clitellum, there are rows of setae, embedded in the epidermal pits in the middle of each segment.

What is common between earthworm and Periplaneta?

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

  1. Both have red coloured blood.

  2. Both possess anal styles.

  3. Both have Malpighian tubules.

  4. Both have segmented body.

Show answer
Correct Option: D
Explanation:

Both earthworm (annelid) and Periplaneta (arthropod) have segmented bodies. In earthworm, the body is metamerically segmented while in Periplaneta, it is externally segmented.

Which one of the following correctly described the location of some body parts in the earthworm Pheretima ?

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

  1. Two pairs of accessory glands in 1618 segments

  2. Two pairs of testes in $10^{th} and 11^{th}$ segments.

  3. Four pairs of spermathecae in 47 segments

  4. One pair of ovaries attached at inter segmental septum of $14^{th} and 15^{th}$ segments.

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Correct Option: B
Which of the following statements is incorrect about the nervous system earthworm?
zoology animal diversity - i (inverterbrate phyla) structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. Nervous system is basically represented by ganglia arranged on ventral nerve cord

  2. In 3rd and 4th segment, the nerve cord bifurcates and joins the cerebral ganglia dorsally to form a nerve ring.

  3. The cerebral ganglia along with other nerves in the ring integrate sensory input as well as command muscular responses of the body

  4. None of these

Show answer
Correct Option: A
Explanation:

The nervous system of earthworm consists of cerebral ganglia or bilobed brain present dorsally, sub pharygeal ganglia, circum pharyngial ganglia and ventral nerve cord. 

So, the correct answer is 'Nervous system is basically represented by ganglia arranged on ventral nerve cord'

Match the following and choose the correct answer.

(A) Hermaphrodite (i) Produces blood cells and haemoglobin
(B) Direct development (ii) Testis and ovary in the same animal
(C) Chemoreceptor (iii) Larval form absent
(D) Blood gland in earthworm Sense of chemical substances
zoology earthworm structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

  1. A- (ii); B- (iii); C- (iv), D- (i)

  2. A- (iii); B- (ii); C- (iv), D- (i)

  3. A- (i); B- (iii); C- (ii), D- (iv)

  4. A- (ii); B- (iv); C- (iii), D- (i)

Show answer
Correct Option: A
Explanation:

(A) Hermaphrodite - Testis and ovary in the same animal

(B) Direct development - Larval form absent.
(C) Chemoreceptor - Sense of chemical substances
(D) Blood gland in earthworm - Produces blood cells and haemoglobin.
So, the correct answer is (a).

Choose the correct answer from the alternatives given.
The yellowing of leaves, called chlorosis, is usually caused by the deficiency of:

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

  1. sodium

  2. phosphorus

  3. magnesium

  4. calcium

Show answer
Correct Option: C
Explanation:

A magnesium-deficient crop will tend to have a pale overall colour. The earliest specific symptom of magnesium deficiency is interveinal chlorosis of older leaves. Chlorosis generally progresses to yellowing and necrosis of the oldest leaves. Therefore, without sufficient amounts of magnesium, plants begin to degrade the chlorophyll in the old leaves. This causes the main symptom of magnesium deficiency, interveinal chlorosis, or yellowing between leaf veins, which stay green, giving the leaves a marbled appearance.

So, the correct option is, 'Magnesium'.

Earthworm and cockroach are ------- in habit.

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

  1. nocturnal

  2. diurnal

  3. annual

  4. seasonal

Show answer
Correct Option: A
Explanation:

  • Animals that are active at night are said to be nocturnal. Cockroaches and earthworm prefer to live in dark places during the day and they are active only at night. 
  • Diurnal animals remain active during the day. E.g: mammals, birds and reptiles.
  • Annual changes in the behaviour of animals are seen due to the changing cycles of day length, annual variability of rainfall etc.
  • Seasonal changes in behaviour occur due to seasonal variations which may cause local climate change, changes in the availability of food etc. E.g: seasonal migration of birds.
So, the correct option is 'nocturnal'.

If an earthworm is possessing $100$ segments, caecum starts from $23^{rd}$, in how many segments typhlosole is extended.

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

  1. $48$

  2. $50$

  3. $52$

  4. $49$

Show answer
Correct Option: A
Explanation:

The typhlosole is a part of the intestine in earthworms. It is folded extensively and increase the surface area for digestion

It runs for almost 25 segments.
Hence starting from 23, it would run upto the 48th segment.
So the correct answer '48'.