Hemichordates were earlier placed as a subphylum under Chord... — Zoology | Mockzy | Mockzy

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Hemichordates were earlier placed as a subphylum under Chordata but are now a separate phylum because:

A

They have no heart

B

They lack a true notochord

C

They are only marine

D

They show radial symmetry

Which of the following lacks an excretory system?

The body of Balanoglossus consists of:

More from Animal Kingdom

The presence of a mid-ventral heart is a character of:

Match the Following: (a) Limbless reptile (b) Jawless vertebrate (c) Limbless amphibian (d) Flightle

Poikilotherms are animals that:

Which of the following is a flightless bird?

Mammals are viviparous (give birth to young) except:

Which of the following is a characteristic feature of mammals?

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