Question

Rolling tongue is an example Environmental variation or Inherited variation

Answer 1

Answer:

Environmental causes of variation

For example, you will become heavier if you eat too much food, and you will become lighter if you eat too little. A plant in the shade of a big tree will grow taller as it tries to reach more light. Variation caused by the surroundings is called environmental variation

Answer 2

Answer:

Tongue rolling is an example of discontinuous variation: you either can roll your tongue or you can't. Other characteristics, for example height and weight, show continuous variation

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