Darwin discovered that the same species of organisms had different traits from one island to the next. According to Darwin, this happened because the organism had. A) adapted to better survive in their habitat.
An atomic battery serves the purpose of being a very long lasting battery without a nuclear chain reaction. Like any other battery, it's used for electricity.
Answer:
An arthropod is an invertebrate animal having an exoskeleton like a crab and a centipede.
Answer: when conditions for survival are unfavorable
Since there is two organism involved, sexual reproduction also increase the genetic variability of the population. This makes the population could adapt in wide condition. When the condition of the habitat changes and make survival is harder for general population, there might be someone with genetic variability that become favored instead.