Practice free Classification of Animal Kingdom (Zoology) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Which of these anelids is an example of an aquatic, dioecious form?
The NCERT text states, 'Nereis, an aquatic form, is dioecious'.
Annelids are characterized by metameric segmentation. What does this mean?
The NCERT text explains: 'Their body surface is distinctly marked out into segments or metameres and, hence, the phylum name Annelida (Latin, annulus: little ring)'.
Which of the following is common to both Annelida and Arthropoda?
Both Annelida are described as 'metamerically segmented' and Arthropoda as 'segmented' in their respective sections and the summary table (Table 4.2). The other options are incorrect for Annelida (no notochord, closed circulatory system, no chitinous exoskeleton).
Identify the characteristic that distinguishes Annelida from Aschelminthes.
Aschelminthes are described as 'pseudocoelomate animals' while Annelida are 'coelomate animals'. Both phyla share bilateral symmetry, triploblastic nature, and organ-system level of organization.
What type of muscles do Annelids possess that aid in their movement?
The NCERT text states: 'They possess longitudinal and circular muscles which help in locomotion'.
Which of the following set of animals are correctly identified as examples of Phylum Annelida?
The NCERT text lists 'Nereis, Pheretima (Earthworm) and Hirudinaria (Blood sucking leech)' as examples of Annelida. The other options are examples of Aschelminthes, Arthropoda, and Mollusca respectively.
Considering the classification hierarchy, where would Annelida fit relative to other phyla like Arthropoda and Mollusca?
The NCERT text introduces Phylum - Annelida, Phylum - Arthropoda, and Phylum - Mollusca as distinct phyla within the Animal Kingdom. The summary table also lists them as separate phyla.
Which of the following levels of organization is first observed in Phylum Platyhelminthes?
According to NCERT, 'A still higher level of organisation, i.e., organ level is exhibited by members of Platyhelminthes and other higher phyla where tissues are grouped together to form organs, each specialised for a particular function.'
Identify the type of body symmetry present in Platyhelminthes.
The summary states, 'The platyhelminths have flat body and exhibit bilateral symmetry.' Also, Table 4.2 lists 'Bilateral' under Symmetry for Platyhelminthes.
What is the nature of the coelom in Platyhelminthes?
While not explicitly stated as 'acoelomate' in the provided text, the NCERT Table 4.2 lists 'Absent' under Coelom for Platyhelminthes, implying they are acoelomates.
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