Ignore the names already there my friend was just messing around

1)Atoms

2) elements

3) molecules

4) compounds

5)organic

6) carbon

7)proteins

8) inorganic

9)water

Atoms   elements   molecules   compounds   organic   carbon   proteins  inorganic  water

Explanation:

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: