In what order do the following structure develop during the metamorphosis of the toad? 1. External gills 2. Internal gills 3. Forelimbs 4.Hindlimbs 5. Mouth
12345
15243
21345
53412
54321
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None of the option here is correct
The right answer should be 51243 
you can make references to modern biology
External gills --- Mouth ----Internal gills ---Hindlimb ---- Forelimb.
This is the correct order, please.
And that's 15243, option B.
Note that, the tadpole do not have mouth until after the external gills stage.
This is why it does not feed initially, but absorbs the remains of the egg yolk.
And the hindlimbs come before the fore limbs.
EXTERNAL GILLS
INTERNAL GILLS
HIND LIMB
FORELIMB
MOUTH OR LUNGS
Reference modern biology page 476
its like you're all mad, all of you are referencing to modern biology and your Answers are still different
The answer is actually A because the aroused jaws is different from the mouth it is after the limbs stage that the aroused jaws changes to mouth
