I believe the biosphere is fragile, because over time all of the pollution us humans have made; If its from air pulloution, acid rain or even water pollution. the toxic acids over time have made the biosphere and the ozon layer weaker and more thin. which causes the biosphere to become weaker.
Answer: 1-DNA, 2-Protein.
Explanation:1- Dna is located in the nucleus of the cell coiled around chromosomes. DNA also carries instructions for protein synthesis, which is used to make cells.
The answer is B... they are poisonous because of the plant they eat
Increased carbon dioxide levels
This is because the plant takes in Carbon Dioxide to use it's carbons to help make energy. So if there is more carbon dioxide, there is more photosynthesis going on in the plant since carbon is also in the sugar the plant uses.