basic words --- 1

Natureを読む進む上で、基礎となる言葉を受験問題からひろって見ることにします。
[防衛医大（部分）]
Like people, cells die in different ways: accident murder, old age, even suicide. In fact, cellular suicide isn't just a curiosity, it's necessary for the health of the organism. During embryonic development, for example, it helps weed out superfluous nerve cells, as well as immune cells that might attack and damage the body's own tissues. Like a spy plane pilot who carries a little vial of poison under his seat in case he's captured, cells carry in their nuclei a genetic program for suicide that can be set in motion, should the cell receive orders to self-destruct. Now, after years of eluding researchers, the genes that carry out the suicide program are coming into the light.

1. cellular 名詞形では? またcellular phoneは、なぜ'cellular'?
2. organism　この文脈ではどういう意味？
3. embryonic　名詞形は？　in ＋ 名詞形で、「未完成で; 〈計画など〉熟さないで.」
   以下の二つは「大学受験対策ブログ」で扱っているので参照。
4. 4.immune　>immunity
5. tissue
6. nuclei　pl.<nucleus
7. genetic　<gene
8. eluding　<elude 意味上の主語は？

should the cell receive orders to self-destruct
=if the cell should receive orders to self-destruct
いわゆる「仮定法未来」というものです。「万一～」と説明されるけれど、起こる可能性が少ない、あるいは起こらないことを願っている気持ちのあらわれとも言える。しばしばwere toと並列的に説明させるが、こちらは原則的に「話のための仮定」、つまりあくまで話のためのたとえであって、実現が想定されていない。