A mutation is a change in trait. For example people who are lactose intolerant are normal, but people that can can drink milk without a problem have mutated. Hopefully this makes sense and helped.
Answer:
D and B
Explanation:
it is hard to explain but
Xylem is responsible for the transport of water and dissolved ions
The phloem is made of companion cells that form to connect pipes
Answer: C) Apical
Explanation: An epithelium has a free surface, the apical surface, exposed to the outside, and an attached surface, the basal surface, resting on the underlying connective tissue.