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NEET2020BotanyAnimal KingdomActual

Which of the following statements are true for the phylum-Chordata? (a) In Urochordata, notochord extends from head to tail, and it is present throughout their life. (b) In Vertebrata, the notochord is present during the embryonic period only. (c) Central nervous system is dorsal and hollow. (d) Chordata is divided into 3 subphyla: Hemichordata, Tunicata, and Cephalochordata.

Options

  1. A(c) and (a)
  2. B(a) and (b)
  3. C(b) and (c)
  4. D(d) and (c)

Correct answer

C. (b) and (c)

Step-by-step solution

Fundamental characters of phylum chordates: 1. Presence of notochord: They are characterized by the presence of rod-like supporting notochord extending throughout the length of the body. 2. Presence of dorsal tubular nerve cord: They are characterized by the presence of dorsal nerve cord lying above the notochord. 3. Presence of paired pharyngeal gill slits: They are characterized by the presence of paired pharyngeal gill slits at some stage of their lifetime. 4. Presences of ventral heart: They are characterized b

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