Tag: structural organization of rabbit

Questions Related to structural organization of rabbit

Choose the correct answers from the alternatives given.


Earthworms differ from most of the marine annelids as in that earthworms:

zoology structural organization of animals structural organization of leech phylum annelida annelida structural organization of rabbit

  1. Lack setae that marine annelids have

  2. Lack paddle-like parapodia that marine annelids have

  3. Have segments, whereas marine annelids do not

  4. Have well-developed brains and sensory organs in the head region, whereas marine annelids do not

Show answer
Correct Option: B
Explanation:

In polychaetes (or marine annelids) parapodia are present that help in gaseous exchange and in movement. Parapodia is absent in earthworm and in earthworms respiration is through skin. So, the correct answer is 'lack paddle-like parapodia that marine annelids have'.

Which ones are not hermaphrodite?

zoology structural organization of animals structural organization of leech phylum annelida annelida structural organization of rabbit

  1. Polychaetes

  2. Leeches

  3. Flatworms

  4. Earthworm

Show answer
Correct Option: A

Which of the following is wrongly matched?

zoology structural organization of animals structural organization of leech phylum annelida annelida structural organization of rabbit

  1. Oligochaeta: Pheretima

  2. Hirudinea: Hirudo

  3. Nematoda: Ascaris

  4. Polychaeta: Lumbricus

Show answer
Correct Option: D

Which of the following is the marine leech?

zoology structural organization of animals structural organization of leech phylum annelida annelida structural organization of rabbit

  1. Sipunculus

  2. Pontobdella

  3. Hirudo

  4. Polygordius

Show answer
Correct Option: B
Explanation:

Pontobdella is segmented worm under the phylum Annelida. It is a marine leech which is ectoparasite on elasmobranchs and is commonly called as 'skate sucker'.
Therefore, the correct answer is option B.

The characteristic feature of leech is

zoology structural organization of animals structural organization of leech phylum annelida annelida structural organization of rabbit

  1. Nephridia

  2. Coelom

  3. Botryoidal tissue and hirudin

  4. All of the above

Show answer
Correct Option: D
Explanation:

Nephridia is an organ involved in the excretory system. It is the characteristic feature of leech. Their bodies are much more solid as the spaces in their coelom are dense with connective tissues. In leeches, the botryoidal tissue is composed of two different cell types. The granular botryoidal cells and flattened endothelial-like cells which contains a brown pigment and may serve an excretory function. Leeches use a combination of mucus and suction to stay attached and secrete an anticoagulant enzyme known as hirudin into the host's blood streams. 

Thus, the correct answer is option D.

Paddle worm amongst the following is 

zoology structural organization of animals structural organization of leech phylum annelida annelida structural organization of rabbit

  1. Arenicola

  2. Chaetopterus

  3. Sabella

  4. Amphitrite

Show answer
Correct Option: B
Explanation:

Chaetopterus, commonly known as paddle worm from class Polychaeta. It is worldwide in distribution. It feeds on small organisms, true filter feeders. The body is divided into an anterior region, middle region and a posterior region. Parapodia have modified accordingly to their function. They are modified into pumping fans, sucking discs and food ball organs and asexual reproduction by transverse fission. So, the correct answer is option B.

Partly open type of circulatory system is found in few members of class

zoology structural organization of animals structural organization of leech phylum annelida annelida structural organization of rabbit

  1. Oligochaeta

  2. Polychaeta

  3. Archiannelida

  4. Hirudinea

Show answer
Correct Option: D
Explanation:
The circulatory system is usually closed in Annelids, i.e., confined within well-developed blood vessels. However, in some Hirudinea, the circulatory system is partly open, with blood and coelomic fluid mixing directly in the sinuses of the body cavity. 
Therefore, the correct answer is option D.

Which of the following organism act as a connecting link between Oligochaeta and Hirudinea?

zoology structural organization of animals structural organization of leech phylum annelida annelida structural organization of rabbit

  1. Haemadipsa

  2. Acanthobdella

  3. Pontobdella

  4. Hirudo

Show answer
Correct Option: B
Explanation:

Acanthobdella forms a connecting link between Oligochaeta and Hirudinea. It is mostly parasitic on fins of salmon fishes. Body comprises of thirty segments only. Its body cavity is spacious and completely divided by septa, vascular system is composed of dorsal and ventral vessel. Hence, option B is correct.

Botryoidal tissue is a characteristic of 

zoology structural organization of animals structural organization of leech phylum annelida annelida structural organization of rabbit

  1. Earthworm

  2. Ascaris

  3. Hirudinaria 

  4. Rabbit

Show answer
Correct Option: C
Explanation:

In leeches, the botryoidal tissue is composed of two different cell types-granular botryoidal cells and flattened endothelial-like cells containing a brown pigment and may serve an excretory function. Hence, option C is correct answer.

Which of the following is an example of leech?

zoology structural organization of animals structural organization of leech phylum annelida annelida structural organization of rabbit

  1. Hirudinaria

  2. Glossiphonia

  3. Haemadipsa

  4. All of the above

Show answer
Correct Option: D
Explanation:

Hirudinaria is an Indian cattle leech. This is the fresh water species. It is cosmopolitan. It feeds on the blood of frog, animals and men. 

Glossiphonia complanata is a leech which often occurs abundantly in eastern United States and Canada. It feeds mainly on the fluid of mollusks and invertebrates. 
Haemadipsa are commonly known as jawed land leeches. These annelids are known from subtropical and tropical regions around the Indian and Pacific Ocean. These are all the different genus of leeches.
Thus, the correct answer is option D.