Biology help please

1.Many freshwater invertebrates eliminate ammonia by:

A. Converting it to uric acid and eliminating it with solid wastes.
B. simple diffusion across the gill membranes.
C. converting it to urea and eliminating it in their urine.
D. simple diffusion across the skin.******

2. Which of the following excretory processes do saltwater and freshwater fishes share?
A. The both conserve water by producing small amounts of concentrated urine.
B. They both actively pump salt across their gills. ********
C. The both avoid drinking water.
D. They both produce lots of watery urine.

3. What excretory characteristic does a garden spider share with a sparrow?
A. They both convert nitrogenous waste to uric acid. *********
B. They both produce lots of diluted urine.
C. They both excrete very concentrated salt solutions.
D. They both produce very dry feces.

My choices are marked with *******
Please help - Thank you (Never did get help from other website suggested) :(

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asked by Cassie

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