What are the Chordates and non-chordates?
- AAnimals with a notochord are chordates; those without are non-chordates.
- BAnimals with a backbone are chordates; those without are non-chordates.
- CAnimals with a nervous system are chordates; those without are non-chordates.
- DAnimals with a coelom are chordates; those without are non-chordates.
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Which of the following statements are true for the phylum $Chordata$?
$(a)$ In $Urochordata$,the notochord extends from head to tail and is present throughout their life.
$(b)$ In $Vertebrata$,the notochord is present during the embryonic period only.
$(c)$ The central nervous system is dorsal and hollow.
$(d)$ $Chordata$ is divided into $3$ subphyla: $Hemichordata$,$Tunicata$,and $Cephalochordata$.
$(a)$ In $Urochordata$,the notochord extends from head to tail and is present throughout their life.
$(b)$ In $Vertebrata$,the notochord is present during the embryonic period only.
$(c)$ The central nervous system is dorsal and hollow.
$(d)$ $Chordata$ is divided into $3$ subphyla: $Hemichordata$,$Tunicata$,and $Cephalochordata$.
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View SolutionIn some chordates,the notochord is replaced by the vertebral column. Such animals are called vertebrates. Which one of the following statements is correct?
Identify the animals belonging to Urochordata (Tunicata) and Cephalochordata,respectively.
Urochordata $\quad$ Cephalochordata
Urochordata $\quad$ Cephalochordata
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