I'm doing a science crossword puzzle on chordate...help me please!!!?

Question

ii forgot my text so i can't answer these questions...

1. the process of change that amphibians undergo as they develope from eggs to an adult? (13 letter word)

2. the largest and most diverse order of fish that includes tuna && trout? (4 letter word)

3. an animal who doesn't produce much heat on it's own? (9 letter word)

4. an animal whose body controls && regulates it's temperature by controlling the internal heat it produces. (9 letter word)

5. an organ that bony fish have that inflates with air to help them float. (11 letter word)

6. the order of fishes that includes sharks && stingrays? (13 letter word)

7. a large muscule in a mammals chest that allows an animal to breathe? (9 letter word, begans with a D)

8.an organ that eliminates wastes from the body while helping to retain water? (6 letter word)

9. the order of fishes that includes lamprey && hagfish? (7 letter word)

put the answer next to the # of the question
(one word answer...only)

thanks

Answer 1

1 is metamorphosis
3 is ectotherm
4 is endotherm
5 is swimbladder
6 is Selachimorpha
7 is diaphram
8 is kidney

Answer 2

1. Metamorphosis

Answer 3

#4 Endotherm

thats all I got

Answer 4

#7 - Diaphragm