Chapter 3 - The Biosphere - Review

All of the members of a particular species that live in one area are called a(an)

• biome.
• community.
• population.
• ecosystem.

Which of the following descriptions about the organization of an ecosystem is correct?

• Communities make up species, which make up populations.
• Populations make up species, which make up communities.
• Species make up communities, which make up populations.
• Species make up populations, which make up communities.

The simplest grouping of more than one kind of organism in the biosphere is

• a population.
• an ecosystem.
• a community.
• a species.

The lowest level of environmental complexity that includes living and nonliving factors is the

• biome.
• ecosystem.
• community.
• biosphere.

Which ecological inquiry method is an ecologist using when he or she enters an area periodically to count the population numbers of a certain species?

• questioning
• experimenting
• observing
• modeling

What is the original source of almost all the energy in most ecosystems?

• carbohydrates
• water
• sunlight
• carbon

The algae at the beginning of the food chain in figure above are

• consumers.

• producers.

• decomposers.

• heterotrophs.

An organism that uses energy to produce its own food supply from inorganic compounds is called a(an)

• heterotroph.
• detritivore.
• consumer.
• autotroph.

Which of the following organisms does NOT require sunlight to live?

• chemosynthetic bacteria
• trees
• algae
• photosynthetic bacteria

In which way are plants in a sunny mountain meadow and sulfur bacteria in a deep-sea volcanic vent alike?

• They both use photosynthesis to make their own food.
• They both produce carbohydrates and oxygen.
• They both use chemosynthesis to produce their own food.
• They both produce carbon and hydrogen.