A plover is a little bird that walks around inside a crocodile’s open mouth and cleans between the crocodile’s teeth. What type of relationship is this?

All consumers could also be called ____________________.

If the producers in an ecosystem generate 25000 Joules of energy, how much energy will be available for the Secondary Consumers in this ecosystem?

Which of these are renewable resources? Select all that apply.

Producers such as plants and some bacteria are able to make their own food, so they can also be called _________________.

Foxes, Lynxes, and Rabbits live in Alaska and Canada. A fox likes to eat rabbits. A lynx also likes to eat rabbits. What type of interaction or relationship does the Fox have with the Lynx?

Foxes, Lynxes, and Rabbits live in Alaska and Canada. A fox likes to eat rabbits. A lynx also likes to eat rabbits. What type of interaction or relationship does the Fox have with the Rabbit?

Work and Energy are both measured in units called ________________.

Which of the following are non-renewable resources used for energy production? Select all that apply.

What term best describes the creature at the top of the energy pyramid in an ecosystem? These creatures eat other consumers and have no natural predators.

If the Law of Conservation of Energy tells us that energy cannot be created or destroyed, then how can energy be "lost" from an ecosystem?

What term do we use to describe an organism that balances an entire ecosystem? If this creature is lost, the entire ecosystem may collapse.

If the secondary consumers have 90 Joules of energy, how much energy must have been brought into the ecosystem by the producers?