However, these changes are temporary and only present if the environmental conditions are met. There are other examples of the influence of the environment on a phenotype. For a fair-skinned person, exposure to sunlight may produce hair that has lightened and a face full of freckles. Primrose plants are red if they are raised at room temperature, but white if they are raised at temperatures about 30°C. Himalayan rabbits are black when raised at low temperatures and white when raised at high temperatures.
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| Reflecting on the Activity and the Challenge | ||
| In this activity you saw that both heredity and environment contribute to the expression of a trait in a plant. You then read about how this also applies to animals. When thinking about how organisms are able to adapt, you must consider both inherited characteristics as well as the influence that the environment has on the organism. You will need to understand this for your Chapter Challenge. Also, in the next activity, you will investigate natural selection. Heredity and the environment both play a role in natural selection. | ||
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