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.
The answer is : D. it may be revised with increasing scientific knowledge.
Explanation: Not only did I take the test, but the current model of the atom isn't similar to the model of the solar system whatsoever. Nor has it stayed the same for centuries. In fact, all of it's revision occurred in the 20th century, not several of centuries. It changed multiple times. Aside from that, the model isn't similar to the model of plum pudding. Therefore, the reasonable answer is D. The model of the atom has changed over time and will continue to do so if more is discovered.
Answer:
Statement 1a: Needle leaves, Pine(Name)
Statement 1b: Non-needle leaves, 2(Number)
Statement 2a: smooth edge, Magnolia(Name)
Statement 2b: jagged edge, Elm(Name)
HI,MATE
HERE'S YOUR ANSWER:
BRIAN SHOULD USE BUZZER.
