Thursday, September 15, 2011

Biology help?

When a tadpole undergoes metamorphosis to a frog,there are quite obvious structural changes. The changes of function are less obvious. For example, the tadpole excretes its nitrogenous wastes as ammonia whereas the frog excretes urea.

a) Ammonia is very soluble and toxic. Give reasons why it is possible for the tadpole to eliminate it safely whereas it is necessary for the frog to change to eliminating the less toxic compound, urea?

b) State two structural changes which occur in the tadpole to accompany this functional change at metamorphosis
Biology help?
a) the tadpole can eliminate it safely because it is in the water, and stated above it shows that %26quot;ammonia is very soluble%26quot; meaning dissolves into water.



b) 1. it changes from water living to land, 2. it changes from releaseing ammonia to urea.
Biology help?
Type that into google and you would be surprised what you find out..
im sorry to not sound serious, but wow.. what type of biology are you taking? my bio class (9th gr) we haven't even started anything like this. (last we did was DNA structure and cell cycle etc.)

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