HELP ASAP!! Based on the video and what you know about natural selection, which of the...
HELP ASAP!!
Based on the video and what you know about natural selection, which of the following must be true if evolution is the explanation for what the Grants have observed over time on Daphne? Select all that apply.
| Beak depth and length must be heritable. |
| Beak depth and length must affect survival and/or reproduction of birds. |
| The beaks of individual birds can change depending on what food is available. |
| Over time, individuals can evolve to better fit the environment by changing heritable traits. |
| Food must be plentiful for all birds. |
| Beak depth and length must show variation among individuals of a single species. |
Homework Answers
Peter and Rosemary Grant studied various traits of finches on the Daphne island. They observed that the main driving force was availability of food, which influence survival rates of finches. Different finches possesses different beak shape and size ,and thus have different survival ability.
Natural selection is the process by which the most adaptive (fittest) individuals are selected and have a chance to leave their offsprings.
Correct choices should be:
| Beak depth and length must be heritable. |
| Beak depth and length must affect survival and/or reproduction of birds. |
| Beak depth and length must show variation among individuals of a single species. |
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