penaabel6202
23.04.2020 •
Biology
A rancher wants to investigate the use of artificial selection in his cattle herd. Which of these options is an example of artificial selection?
A) Breed a cow that produces large quantities of milk with a bull that comes from a line of cattle with long lifespans.
B) Trace the family tree of a chicken that lays many eggs back through several generations.
C) Separate a population of rabbits and monitor any trait changes over the next few generations.
D) Choose one individual in a population of sheep to favor with food and shelter and see if it mates more.
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Ответ:
Heritable variation exists for traits among individuals in a population.
Explanation:
According to Darwin's theory of evolution, natural selection is the main evolutionary mechanism. Darwin explains that organisms that have heritable traits that help them survive and reproduce, will be favorable by natural selection. Those favorable traits will enable organism to better adapt to their environment and to pass more genes on to the next generation (offspring).
Organisms adapt to their environment by changing their behavior, structural traits or physiology as a response to environmental change, so that they become well suited to it.