Which is an example of an environmental influence that would most likely result in natural selection?
the soil in a field always has lots of nutrients, so corn plants in a population can grow quickly.
a fish is born with a genetic mutation that produces a longer tail, allowing the fish to swim faster than others in the population.
a food resource disappears in a pond, and some frogs in a population can eat the remaining food resource, while others cannot.
the temperature in a lake remains constant, so most of the turtle population survives to adulthood.

Mike was adopted, and his biological family history is unknown. although he is healthy, he would like some understanding of his genetic makeup, including potential health risks and genes that he could pass on to his children. mike has heard about commercial laboratories that can compare segments of your dna to those of people with common hereditary diseases in order to give you some idea of how susceptible you are to the diseases. the results of these types of tests are highly inconclusive. if mike's dna showed that he shares similarities in a segment of dna with people who have a given disease, his chances of developing that disease or passing it on to his children may be slightly elevated, but they are not 100 percent. these tests can cost more than $2,500 and are not covered by many insurance companies. do you think that mike should undergo the genetic tests? explain your answer. what are the potential pros and cons of having such tests done? describe how the availability of these genetic tests might affect the frequency of genetic diseases in individuals and populations.

When plants use sunlight to make food, the energy of sunlight is

Why do oceanic plates tend to subduction when colliding with a continental plate