Genetic Mutations Produce Variation Quick Check 4 of 54 of 5 Items Question Millions of years ago, the ancestors of giraffes had short necks and used to eat leaves from the bushes on the ground. A genetic mutation caused one giraffe's neck to be taller. This long-necked giraffe was able to eat leaves that were higher up on trees. This gave it an advantage as it was able to access more food than other giraffes. Over millions of years, all of the giraffes became long-necked. Which type of environmental factor caused this mutation to be inherited? (1 point) Responses exercise requirement exercise requirement polluted environment polluted environment food availability food availability radiation exposure radiation exposure Skip to navigation page 11 of 11

Question

Genetic Mutations Produce Variation Quick Check 4 of 54 of 5 Items Question Millions of years ago, the ancestors of giraffes had short necks and used to eat leaves from the bushes on the ground. A genetic mutation caused one giraffe's neck to be taller. This long-necked giraffe was able to eat leaves that were higher up on trees. This gave it an advantage as it was able to access more food than other giraffes. Over millions of years, all of the giraffes became long-necked. Which type of environmental factor caused this mutation to be inherited? (1 point) Responses exercise requirement exercise requirement polluted environment polluted environment food availability food availability radiation exposure radiation exposure Skip to navigation page 11 of 11

Answer 1

The correct response is food availability. The genetic mutation that resulted in longer necks in giraffes provided them access to more food sources (higher leaves), which gave them an advantage in their environment, leading to the inheritance of this trait over time.