Texas TEKS Standards
TX.112.20. Science, Grade 8.
(8.11) Organisms and environments. The student knows that interdependence occurs among living systems and the environment and that human activities can affect these systems. The student is expected to:
8.11 (A) Describe producer/consumer, predator/prey, and parasite/host relationships as they occur in food webs within marine, freshwater, and terrestrial ecosystems.
8.11 (C) Explore how short- and long-term environmental changes affect organisms and traits in subsequent populations.