Light aka the sun I know for a fact
Answer AND Explanation:
Darwin describes natural selection as a process whereby nature selects those organisms that have favourable characteristics to be parents of the next generation. The individuals possessing the favourable traits are better suited to the prevailing environmental conditions. This enables them to stand a better chance to survive in the struggle for existence due to limited resources.
ANSWER:
Index Fossils can be used to identify a specific period of time
Your answer would most likely be chlorophyll. :)
The common passageway shared by the respiratory and digestive system is the pharynx
