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ARC-Easy / MDSA_2009_8_12 / Nitrogen, a nutrient found in fertilizer, helps plants increase in size.…

Problem

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question

Nitrogen, a nutrient found in fertilizer, helps plants increase in size. Rainwater runoff often carries fertilizer into ponds and lakes. What effect does excess nitrogen have on organisms in a pond or lake ecosystem?

choices

  • Algae grows rapidly.
  • Mutations occur gradually in fish.
  • Clam shells are slowly weakened.
  • Frogs adapt quickly to new food sources.

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