differentiate chordate or non chordate
Answers
Answer:
Chordates
Non-chordates
Notochord
Present (at least in one stage in their lifecycle)
Absent. Non-chordates do not have a
Cold Blooded/Warm Blooded
Chordates can either be cold-blooded or warm-blooded
All non-chordates are cold-blooded
Mode of Respiration
Respiration occurs either through lungs or gills
Non-chordates respire through tracheae, gills or body surface
Presence of Haemoglobin
Present
Absent. Hemolymph is present, which is analogous to blood in the vertebrates
Germ Layer
Chordates are triploblastic
Non-chordates can either be triploblastic, diploblastic, or neither
Symmetry
Chordates are bilaterally symmetric
Non-chordates can either be bilateral, radial, bi-radial, or asymmetrical.
Coelom
True coelomates
Can be either true coelomates, acoelomates, pseudocoelomates.
Tail (post-anal)
Usually present
Absent
Exoskeleton
Present in some animals, such as tortoises.
Present
Endoskeleton
Present
Absent
Regeneration
Mostly poor
Mostly good
Nerve Chord
Dorsal, single, without ganglia
Ventral, double, usually bears ganglia
Blood Circulation
Closed
Usually open circulation
Anus
It is differentiated and opens before the last segment
Usually absent. If present, it opens on the last segment
Brain
Present, dorsal to pharynx in head
Present in some cases, but nowhere as complex as the brain in chordates.
Organization
Organ-system
Protoplasmic to organ-system
Heart
Ventrally placed
Absent. Dorsal/ lateral placement if present
Example
Mammals
Arthropods
Answer:
Chordates and Non-chordates are primarily differentiated by the presence or absence of an important structure called the notochord at some point in their lifecycle. However, there are many more differences that separate these two groups of organisms. Read on to learn the difference between chordates and non-chordates.
Chordates
Present (at least in one stage in their lifecycle)
Non-chordates
Absent. Non-chordates do not have a