Heartwood. In contrast to sapwood, a term for the dead, clogged xylem cells near the center of a tree. Heartwood is the tree's main column of support.
i think the most logical is A
because antibiotic resistant occurs when bacteria change in some way that reduces or eliminates the effectiveness of drugs, chemicals, etc
Answer:
What is the name of this website
or the book?
The answer is B I'm pretty sure of it.
