What does natural selection refer to? 1) a trait that you survive and reproduce 2) the environment determines which traits are favorable for a species to survive and reproduce 3) humans selecting favorable traits in crops and domesticated animals to be pass down 4) species change over time and morph themselves to have favorable traits

1 is the answer. Natural selection doesn’t happen quickly though. An organism has a mutation that is favorable to the environmental conditions. So others mate with them to pass on those traits and survive.

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

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