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प्रश्न
Which among the following have an open circulatory system?
- Arthropoda
- Mollusca
- Annelida
- Coelenterata
पर्याय
(i) and (ii)
(iii) and (iv)
(i) and (iii)
(ii) and (iv)
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उत्तर
(i) and (ii)
Explanation -
In the open circulatory system, blood flows in open spaces and bathes the cells directly. It does not flow in well-defined blood vessels. Examples-Arthropoda and Mollusca (except cuttlefish).
In the closed circulatory system, blood circulates inside the blood vessels without ever coming in direct contact with the body cells. Examples- Annelida and Chordata.
Blood is not present in the phyla Porifera, Coelenterata, Ctenophora, Platyhelminthes, and Aschelminthes.
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संबंधित प्रश्न
Sketch, labell and classify Butterfly.
Observe the following diagram. Write the answers of the following questions.
- To which phylum does the animal included in the diagram belong?
- What is the exoskeleton made up?
- What is the symmetry?
Which animal has three pairs of legs?
Which phylum has the characteristic phenomenon ‘jointed appendages’?
Observe the following figure and answer the following.
- Due to which common characteristic the animals shown in the figure belong to the same phylum?
- The exoskeleton of these animals is made up of which chemical?
- Give another two examples of this phylum.
Give an account on phylum Arthropoda.
______ is the largest phylum of the animal kingdom.
Which one of the following statements is incorrect?
Write the correct co-relation.
Butterfly : Arthropoda : : Earthworm : ______.
Example of phylum Arthropoda is ______.
