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IMPORTANT
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Statement 1 - In vertebrates, the notochord is replaced by vertebral column, but in protochordates, the notochord remains as it is.

Statement 2 - All vertebrates are chordates but all chordates are not vertebrates

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Important Questions on Animal Kingdom

EASY
NEET
IMPORTANT
Which of the following characteristics are true for Phylum Platyhelminthes?
I. Some absorbs nutrients from the host directly through their body surface.
II. Digestive system (if any) incomplete, branched and without anus.
III. Flame cells/solenocytes/protonephridia help in excretion and osmoregulation.
IV. Hooks and suckers are present in parasitic forms.
V. Hermaphrodites (usually).
VI. Fertilization internal.
VII.Indirect development (usually) through many larval stages.
MEDIUM
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IMPORTANT
In understanding different types of symmetry, the term used as principal axis means:
I) A flat area that run through any axis
II) An imaginary straight line joining two opposite points at the ends
III) An imaginary straight line joining the mid-point at one end and the mid-point at the opposite end
IV) An animal having its body parts arranged in such a manner to exhibit symmetry