Answer:
The answer to your question is below
Explanation:
Balance the following equation
1 N₂ + 3 F₂ ⇒ 2 NF₃
2 - N - 2
6 - F - 6
Natural selection means that the organisms better adapted to their environment, that is, they have developed the right characteristics/skills/response to the external ambient, have higher chance to survive, making the next generations genetically inherit such acquired surviving characteristics.
These generations will thus have a higher chance of survival, making these species being "naturally selected" as survivors, while those who haven't or are slower in this process, have a higher risk of elimination.
Answer:
(a) Allow movement in only one plane/direction (that is extension or flexion)
(b) The skeletal system also produces blood cells in their bone marrow
They are all final consumers
I hope this help but the metalloids is gruop five if that what your asking if not i will answer the other question for you
