Practice free Classification of Animal Kingdom (Zoology) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
An example of an organism belonging to Cephalochordata is:
The NCERT lists 'Branchiostoma (Amphioxus or Lancelet)' as an example of Cephalochordata, while Ascidia, Salpa, and Doliolum are examples of Urochordata.
Which of the following statements about the circulatory system in chordates is correct?
The NCERT text states: 'They possess a post anal tail and a closed circulatory system' referring to Chordates in general.
How does the central nervous system of chordates differ from that of non-chordates?
Table 4.1 in NCERT states: 'Chordates: Central nervous system is dorsal, hollow and single.' and 'Non-chordates: Central nervous system is ventral, solid and double.'
Which of the following is a characteristic feature of Vertebrata, distinguishing them from other chordates?
The NCERT states: 'The members of subphylum Vertebrata possess notochord during the embryonic period. The notochord is replaced by a cartilaginous or bony vertebral column in the adult.'
All vertebrates are chordates, but all chordates are not vertebrates. This statement is justified because:
The NCERT explains this: 'Thus all vertebrates are chordates but all chordates are not vertebrates.' This is because subphyla Urochordata and Cephalochordata (protochordates) are chordates, but they do not develop a vertebral column from the notochord, which is a defining characteristic of vertebrates.
Which of the following organisms are correctly grouped under Urochordata?
Examples of Urochordata given in NCERT are 'Ascidia, Salpa, Doliolum'. Branchiostoma/Amphioxus/Lancelet are Cephalochordates. Balanoglossus is a Hemichordate. Asterias/Ophiura are Echinoderms.
Protochordates are characterized by being:
The NCERT states: 'Subphyla Urochordata and Cephalochordata are often referred to as protochordates and are exclusively marine.'
Besides the basic chordate characters, vertebrates also possess:
The NCERT describes vertebrates: 'Besides the basic chordate characters, vertebrates have a ventral muscular heart with two, three or four chambers, kidneys for excretion and osmoregulation and paired appendages which may be fins or limbs.'
Which of the following characteristics is NOT found in organisms belonging to the class Cyclostomata?
According to the NCERT text, Cyclostomes have a sucking and circular mouth without jaws, and their body is devoid of scales and paired fins. Therefore, the presence of jaws and paired fins is incorrect.
Cyclostomes are characterized by their unique migratory pattern. Which of the following statements accurately describes their migration?
The NCERT states, Cyclostomes are marine but migrate for spawning to fresh water. After spawning, within a few days, they die. Their larvae, after metamorphosis, return to the ocean.
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