What is the role of the greenhouse gases in the atmosphere? a) they trap some of the sun's heat energy within the atmosphere, to maintain earth's average temperature. b) they prevent most of the sun's rays from reaching earth, thereby preventing earth from heating up. c) they divert the sun's heat from the equator to the poles, causing the ice caps to melt, leading to global warming. d) they destroy the ozone layer, allowing harmful ultraviolet rays of the sun to reach the surface of earth.

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.