Digital Frog International educational software &
Texas Essential Knowledge and Skills for Science

(a) Introduction.

4. (E) Organisms and environments. In studies of living systems, students explore the interdependence between these systems. Interactions between organisms in ecosystems, including producer/consumer, predator/prey, and parasite/host relationships, are investigated in aquatic and terrestrial systems. Students describe how biotic and abiotic factors affect the number of organisms and populations present in an ecosystem. In addition, students explore how organisms and their populations respond to short- and long-term environmental changes, including those caused by human activities.

Study section; Endangered Wetlands section

Study section; Endangered Rainforests section

Desert Study section; Human Impact section

Ecology section; Anatomy section

(b) Knowledge and skills.

11. (A) describe producer/consumer, predator/prey, and parasite/host relationships as they occur in food webs within marine, freshwater, and terrestrial ecosystems;

Food Web screens

Dependency Web screens

Refer to Build-A- Desert

11. (B) investigate how organisms and populations in an ecosystem depend on and may compete for biotic and abiotic factors such as quantity of light, water, range of temperatures, or soil composition;

Refer to Food Web

Refer to Dependency Web

Refer to Build-A- Desert

11. (C) explore how short- and long-term environmental changes affect organisms and traits in subsequent populations; and

Refer to Adaptations

Biodiversity screens

What is an adaptation