(C)theories can be used to predict the existence of as of yet unobserved things or phenomena
Answer:
The fundamental structure of a chromosome is subject to mutation, which will most likely occur during crossing over at meiosis.
Explanation:
The limbs of the organisms are similar because they are formed in similar ways during embryonic development and share similar arrangements.
The answer is b i believe sorry if i am wrong
Elements are pure substances made up of atoms
