Which among the following is correct combination?

Leech and Nereis- Annelida; Scolopendra, Prawn and Scorpion- Arthropoda

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Leech and Nereis- Arthropoda; Scolopendra, Prawn and Scorpion- Annelida

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Leech and Nereis- Mollusca; Scolopendra, Prawn and Scorpion- Annelida

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Leech and Nereis- Echinodermata; Scolopendra, Prawn and Scorpion- Annelida

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Solution

The correct option is A Leech and Nereis- Annelida; Scolopendra, Prawn and Scorpion- Arthropoda
Mollusca have soft, unsegmented body differentiated into three regions as head, visceral hump and foot, have an open circulatory system.
Echinodermata has radial symmetry with several arms.
Leech and Nereis are the annelids as they have metamerically segmented body, i.e., the body is divided into many segments internally by septa.
Scolopendra, prawn and scorpion are the arthropods, as these have jointed legs and open circulating system. Thus, the correct answer is option A.

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Q. Leech, Nereis, Scolopendra, prawn and scorpion all have segmented body organization, but still, they cannot be classified in one group. Which of the following is the correct basis for the classification of these organisms into different groups?

Q. You are given leech, Nereis, Scolopendra, Prawn, and Scorpion; and all have segmented body organization, Will you classify them in one group? If no, give the important characters based on which you will separate these organisms into different groups.

Question 53
You are given leech, Nereis, Scolopendra, prawn and scorpion; and all have segmented body organisation. Will you classify them in one group? If no, give the important characters based on which you will separate these organisms into different groups.

Q. Select the option with the correct exception

	Organisms	Category	Exception
(A)	Cacti, Venus Fly, Trap	Plants	Cacti
(B)	Penicillium, Aspergillus, Mucor	Fungi	Mucor
(C)	Ascaris, Nereis, Wuchereria	Aschelminthes	Nereis
(D)	Scorpion, Prawn, Anopheles	Arthropoda	Prawn

Q. What is true about Nereis, scorpion, cockroach and silverfish?

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