The chemical formula for water is H2O which means that every molecule of water has 2 atoms of hydrogen (H) and one atom of oxygen (O). Here comes the key part. From the Periodic Table of Elements, one sees that one molecule of oxygen atoms weigh 16 grams.
I apologize if this is not what you meant. If you have further questions just tell me.
A virus, because it has a non-cellular structure.
Answer: Adaption (I think)
Explanation: Certain living organisms and animals can adapt to harsh environmental conditions, and if I'm not wrong, cells can adapt, as well.
Answer:
Zebra mussels negatively impact ecosystems in many ways. They filter out algae that native species need for food and they attach to--and incapacitate--native mussels. Power plants must also spend millions of dollars removing zebra mussels from clogged water intakes.
Answer:
Just based on common sense, its either C or D. I would guess C but not 100% sure sorry.
Explanation:
