When boiling an enzyme, the chemical bonds that hold the enzyme together start to break down. this results in the enzyme to loss it's three-dimensional structure and casuses it to no longer fit their target substrate molecules, and the enzyme stops functioning.
Answer:
B. They all have the same genes but some have hair and some don't
Explanation:
Type I genes tend to be involved in immune response or sensory receptors while type III genes are involved in cell to cell signalling and type II genes are a complex mix of all three types.
I think the answer here is neurons, the nerve cells
C. The problem of endangered species
The answer is C and D.
I hope this helps. Good luck!