Answer: Ethylene
Explication: Ethylene is a hydrocarbon which has the formula C ₂H ₄ or H₂C=CH₂. It is a colorless flammable gas with a faint "sweet and musky" odor when pure. It is the simplest alkene. Ethylene is widely used in the chemical industry, and its worldwide production exceeds that of any other organic compound.
Oil
renewable resources have a infinite supply
air pollution has no demand
Answer:
D. All of the above
Explanation:
Neanderthal man (<em>Homo sapiens neanderthalensis</em>):
Their fossils were first obtained from Neander valley in Germany which belonged to late pleistocene epoch. Later many other fossils were recovered from various countries by different paleontologists. Neanderthal man had slightly prognathus face. They walked upright like us and has low brows, receding jaws and high domed heads. The main point of difference from us was that they were much stockier than we are. Their cranial capacity was 1300-1600 cc. They were cave dwellers with humped back. They were also skilled in hunting and skilled predators. The neanderthal man was cannibal and they fashioned the skin into clothing to protect themselves from harsh climate conditions. Its also believed that they buried their dead ones with flowers and tools. <em>Homo sapiens neanderthalensis</em> did not evolve into <em>homo sapiens</em>. <em>Cro magnon</em> was the direct ancestor of the living modern man.
Answer: directional selection
Explanation: Directional selection occurs when one end of the bell curve has a better fit than the other end. The end that has preferable traits in relation to the environment won't always be the same. The environment can change, and then the opposite end of the bell curve might become preferable.
