Explanation:
multipotent cells is the likely answer
Answer: D
They often occur spontaneously, because when energy is released during a chemical reaction it does not usually happen slowly.
Chemical reactions occur when chemical bonds between atoms are formed or broken. If this is what you mean because the question is really confusing sorry :(
Answer:
Birds and bats have homologous limbs because they are both ultimately derived from terrestrial tetrapods, but their flight mechanisms are only analogous, so their wings are examples of functional convergence.
