2 bio questions!

[virtualmaster999]

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Hi everyone!

I have two really quick questions for bio:

1) What nitrogenous waste do amphibians excrete as they are both aquatic and land animals? Ive read both ammonia and urea, but is there one to know for the test?

2) So myoglobin and hemoglobin both bind CO stronger than O2. Which one binds CO stronger though? In Feralis' notes it says hemoglobin, but I thought it was myoglobin??

Thanks in advance everyone! Much appreciated!!

 

[510586]

http://www.ncsu.edu/project/bio181de/Lab/animal_diversity/amphibians.html says that they mostly secrete ammonia then a bit of urea.

 

[RuffDay]

I wouldn't worry about the details. My guess for number 2 is that it is hemoglobin because myoglobin binds to O2 strongly and found in muscles. Stronger O2 binding means weaker binding of CO2.

Anyone correct me if I am wrong.