What is the main source of energy in an energy pyramid?

• Sunlight

• Water

• Wind

• Coal

Which trophic level is always at the base of an energy pyramid?

• Primary Consumer

• Secondary Consumer

• Producer

• Tertiary Consumer

Which organism is at the highest trophic level?

• Producer

• Primary Consumer

• Secondary Consumer

• Tertiary Consumer

What is the role of decomposers in the energy pyramid?

• Produce energy

• Consume energy

• Break down dead organisms

• Photosynthesis

Which organism is at the highest trophic level?

• Producer

• Primary Consumer

• Secondary Consumer

• Tertiary Consumer

What is the role of decomposers in the energy pyramid?

• Produce energy

• Consume energy

• Break down dead organisms

• Photosynthesis

According to this food web, which organisms would the bobcat and snake compete for if the mouse population and swamp rabbit population decreased?

• Raccoon and sparrow

• Raccoon and Eastern cottontail rabbit

• Sparrow and seeds

• Sparrow and cottontail rabbit

Wild hogs introduced to Texas from Europe became feral after the hogs escaped from the ranches where they lived.  Feral hogs are omnivores that feed on native plants, crops, and small animals.  Feral hogs can damage an ecosystem by rooting through the soil to look for food and trampling small plants.

Which types of native organisms do feral hogs most likely compete with for food sources?

• Carnivores and producers

• Herbivores and carnivores

• Producers and decomposers

• Decomposers and herbivores

Sea anemones and clown fish live together in the ocean. Which statement best describes one way sea anemones depend on clown fish for an abiotic factor in an ecosystem?

• Clown fish protect sea anemones from predatory fish.

• Clown fish decrease competition among sea anemones.

• Clown fish consume the remains of organisms paralyzed by sea anemones.

• Clown fish move water near sea anemones when dissolved oxygen levels are low.

Which statement best explains a difference between Plant 1 and Plant 2?

• Plant 1 obtains more water from the soil because of its root surface area and root depth.

• Plant 1 obtains more sunlight because of its root surface area and root depth.

• Plant 2 obtains more water from the soil because of its root surface area and root depth.

• Plant 2 obtains more sunlight because of its root surface area and root depth.