Ecology is the natural science of the relationships among living organisms and what else?

What levels of life are considered in the study of relationships between organisms and their environments?

What is a group of similar organisms that can breed and produce fertile offspring called?

What defines a population?

What did astronauts consider the most important emotional discovery they made while traveling to space?

What term do biologists use to describe the thin skin of life covering the planet?

What components are included within the biosphere?

What does the Greek root word "oikos" mean?

Which other field of study shares the same Greek root word as the scientific study of interactions among organisms?

What is an assemblage of different populations that live together in a defined area called?

What term describes all the organisms that live in a place together with their physical environment?

What characterizes a biome?

Which of the following are explicitly identified as greenhouse gases?

What is the primary function of greenhouse gases in the atmosphere?

How does energy move through an ecosystem?

What is a series of organisms in which energy is transferred from one organism to another?

In the Gorongosa National Park example, what organism serves as the primary producer?

What are the tiny floating algae that serve as primary producers in the open ocean called?

Why is the movement of energy and matter through most feeding relationships complicated?

What do ecologists call the complex network of feeding interactions through which both energy and matter move?

What is another term for organisms that must acquire energy from other organisms because they cannot harness it directly from the environment?

Which typically carnivorous animal is noted as scavenging if it gets the chance?

Why are leaves considered tough to digest?

How do many animals successfully extract nutrients from leaves?

What is the regurgitated mixture of food and bacteria that grazing animals chew called?

Why do only a handful of birds eat leaves?

What happens to the concentration of oxygen in ocean water as depth increases?

To what depth can light penetrate in most ocean water?

What type of animals consume the carcasses of other animals that have been killed by predators or died of other causes?

What do decomposers produce when they chemically break down organic matter?

Which organisms are provided as specific examples of decomposers?

Which animals obtain energy and nutrients by eating plant leaves, roots, seeds, or fruits?

What term describes animals that eat both plants and other animals?

Which organisms commonly chew or grind detritus particles into smaller pieces?

What process describes water evaporating from the leaves of plants?

What does water vapor turn into when the air carrying it cools down?

What is precipitation that flows along the surface of the land called?

What is water that is absorbed into the soil called?

What combination of factors led to exponential human population growth after the Industrial Revolution?