The answer is d: all of the above! Hope this help!
Answer:
Explanation:
fur and milk
A duck billed platypus is classified as a mammal because it feeds its kids with milk and it has fur. They are very unsual because of the way they dig dirt burrows at the water's edge and how they dont have a stomach
Answer:
D The types of proteins produced by each gene
Explanation:
This is a late answer so im guessing its D because proteins have many jobs in regulating function and genes dont change the way a cell functions.