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Organism growth and the environment

Review your understanding of organism growth and the environment in this free article aligned to NGSS standards.

Key points:

  • An organism’s traits depend on both its genes and its environment.
  • Genes make up the hereditary material inside an organism’s cells. Genes provide information about an organism’s traits.
  • Genes can affect how an organism grows. For example, some dog breeds are large and others are small. Any influence of genes is called a genetic factor.
  • An organism’s environment is all the things the organism is exposed to as it lives and grows. These things include temperature, light, food, and water.
  • The environment also affects how an organism grows. For example, a plant will grow bigger if it is given fertilizer. Any influence of the environment is called an environmental factor.
Different dog breeds. As a result of genetic differences between breeds, one dog is large and the other is small. Image credit: “Big and little dog 1 " by Ellen Levy Finch, CC BY-SA 3.0.

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