Which of the following has the most primitive respiratory system?

chisibiggest

10 years ago

Oga na grasshopper.... Primitive means lacking latest nd modern advancement!... In terms of phylum... Insecta comes b4 all others!.... Rat z mammalia @brown!

Myschool Kelly

9 years ago

Correction has been made. Thanks for your contributions.

MNATHANIEL

3 years ago

grasshopper is correct

hardewaih

9 years ago

d ans is grasshopper

Dave333

4 years ago

KEY-POINTS…
Another complication arises with insects; they have no gills, no lungs, they only have tracheae. Now the big question is… ...
Fishes' respiration are taken as more primitive than snails' because fishes breath through gills only, but snails breath through both gills and lungs

award141

10 years ago

the answer is grasshopper...rat respire with dere lungs,fish respire with dere gills...grasshopper respire with dere tracheal tube...for me tracheal tube is the most primitive

Dcandle

9 years ago

D is the right answer. Please correct this

ABOLDIUM

3 years ago

The answer is fish, because based on evolution life started in water,before land animal evolved..

ABOLDIUM

3 years ago

The answer is fish, based on evolutionary trend life started from water. Primitive also means with evolved first.

Brown Ice

11 years ago

The answer is option A.Rat