Answer:
Cancer is caused by accumulated damage to genes. Such changes may be due to chance or to exposure to a cancer causing substance. The substances that cause cancer are called carcinogens. A carcinogen may be a chemical substance, such as certain molecules in tobacco smoke.
Explanation:
Answer:
All of the options supplied describe the reasons for the extinction of dinosaurs and other species over 65m years ago.
Explanation:
When an impact event happens, the enormous kinetic energy of the asteroid or meteorite – a massive body travelling at high speed – is partly transferred to the Earth but largely converted into heat and sound, creating pressure waves travelling radially outwards from its centre, similar to that of an atom bomb.
As well as this blast created on impact, large amounts of dust can be kicked up into the atmosphere – like a nuclear winter – blocking out sunlight and preventing plants from photosynthesising, which has a knock-on effect to much of the rest of the ecosystem.
I believe that attached to this question are choices that contain the answer. As I say the choices, I believe that all of the listed characteristics makes the sphagnum peatlands responsible for inhibiting decomposition. Sphagnum peatlands are mosses that are conditions our soils.
